element-hq Vulnerabilities and Affected Products
Explore source-attributed vulnerabilities associated with element-hq products.
Products
- synapse11 vulnerabilities
- element-web5 vulnerabilities
- element-android3 vulnerabilities
- element-x-android2 vulnerabilities
- element-call1 vulnerability
- element-desktop1 vulnerability
- element-x-ios1 vulnerability
- ess-helm1 vulnerability
- matrix-authentication-service1 vulnerability
- matrix-tools1 vulnerability
| Vulnerability | Title and context | CVSS | EPSS | PoCs | Signals | STIX action |
|---|---|---|---|---|---|---|
CVE-2026-48007HIGH | Element Call reports full URLs of visited pages to analytics serverElement Call is a native Matrix video conferencing application. Versions 0.5.17 through 0.19.3 report analytics data to a PostHog server, when configured to by a `posthog` key in config.json or by the `posthogApiHost` and `posthogApiKey` URL parameters. Several fields of this data (`$initial_person_info`, `$session_entry_url`, and `$current_url`) were found to contain the full URL of the user's visited page, including the fragment. Users of a standalone Element Call ‘SPA’ instance such as https:… CWE-200Aug 7, 2026 | CVSS8.6v4.0 | EPSS0.165% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-45078MEDIUM | Synapse CPU starvation (Denial of Service)Synapse is an open source Matrix homeserver implementation. Prior to 1.152.1, local authenticated users can cause Synapse to starve other requests of CPU and lead to other requests failing, causing other users to be denied service. This vulnerability is fixed in 1.152.1. | CVSS6.8v4.0 | EPSS0.128% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-45076MEDIUM | Synapse pagination denial of serviceSynapse is an open source Matrix homeserver implementation. Prior to 1.152.1, in federated rooms, malicious homeservers can craft room events in such a way that prevents Synapse from providing full history to paginating clients. Clients could therefore fail to display room history. This vulnerability is fixed in 1.152.1. CWE-20May 28, 2026 | CVSS5.1v4.0 | EPSS0.369% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2026-24044CRITICAL | ESS Community Helm Chart has a weak server key generation methodElement Server Suite Community Edition (ESS Community) deploys a Matrix stack using the provided Helm charts and Kubernetes distribution. The ESS Community Helm Chart secrets initialization hook (using matrix-tools container before 0.5.7) is using an insecure Matrix server key generation method, allowing network attackers to potentially recreate the same key pair, allowing them to impersonate the victim server. The secret is generated by the secrets initialization hook, in the ESS Community Helm… CWE-336Feb 12, 2026 | CVSS9.2v4.0 | EPSS0.278% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2025-62425HIGH | Matrix Authentication Service account password can be changed using an authenticated session without supplying the current passwordMAS (Matrix Authentication Service) is a user management and authentication service for Matrix homeservers, written and maintained by Element. A logic flaw in matrix-authentication-service 0.20.0 through 1.4.0 allows an attacker with access to an authenticated MAS session to perform sensitive operations without entering the current password. These include changing the current password, adding or removing an e-mail address and deactivating the account. The vulnerability only affects instances whi… CWE-620Oct 16, 2025 | CVSS8.3v3.1 | EPSS0.422% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2025-61672MEDIUM | Synapse: Invalid device keys degrade federation functionalitySynapse is an open source Matrix homeserver implementation. Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. The issue is patched in Synapse 1.138.3, 1.138.4, 1.139.1, and 1.139.2. Note that even though 1.138.3 and 1.139.1 fix the vulnerability, they inadvertently introduced an unrelated regression. For this… CWE-1287Oct 8, 2025 | CVSS5.3v4.0 | EPSS0.434% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
In Element Web and Element Desktop, a malicious room can hide an unrelated room and cause it to be left when the malicious room is leftElement Web is a Matrix web client built using the Matrix React SDK. Element Web and Element Desktop before version 1.11.112 have insufficient validation of room predecessor links, allowing a remote attacker to attempt to impermanently replace a room's entry in the room list with an unrelated attacker-supplied room. While the effect of this is temporary, it may still confuse users into acting on incorrect assumptions. The issue has been patched and users should upgrade to 1.11.112. A reload/refr… CWE-20Sep 16, 2025 | CVSS2.7v4.0 | EPSS0.38% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2025-27599MEDIUM | Element X Android vulnerable to loading malicious web pages via received intentElement X Android is a Matrix Android Client provided by element.io. Prior to version 25.04.2, a crafted hyperlink on a webpage, or a locally installed malicious app, can force Element X up to version 25.04.1 to load a webpage with similar permissions to Element Call and automatically grant it temporary access to microphone and camera. This issue has been patched in version 25.04.2. | CVSS6.5v3.1 | EPSS0.346% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Element Web could load a malicious instance of Element Call leaking media encryption keysElement Web is a Matrix web client built using the Matrix React SDK. Element Web, starting from version 1.11.16 up to version 1.11.96, can be configured to load Element Call from an external URL. Under certain conditions, the external page is able to get access to the media encryption keys used for an Element Call call. Version 1.11.97 fixes the problem. CWE-497Apr 8, 2025 | CVSS3.8v3.1 | EPSS0.154% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2025-31126MEDIUM | Element X iOS allows the entity in control of the well-known file to break the confidentiality of embedded Element CallElement X iOS is a Matrix iOS Client provided by Element. In Element X iOS version between 1.6.13 and 25.03.7, the entity in control of the element.json well-known file is able, under certain conditions, to get access to the media encryption keys used for an Element Call call. This vulnerability is fixed in 25.03.8. CWE-200Apr 3, 2025 | CVSS5.3v3.1 | EPSS0.188% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2025-31127MEDIUM | Element X Android allows the entity in control of the well-known file to break the confidentiality embedded Element CallElement X Android is a Matrix Android Client provided by element.io. In Element X Android versions between 0.4.16 and 25.03.3, the entity in control of the element.json well-known file is able, under certain conditions, to get access to the media encryption keys used for an Element Call call. This vulnerability is fixed in 25.03.4. CWE-200Apr 3, 2025 | CVSS5.3v3.1 | EPSS0.188% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2025-30355HIGH | Synapse vulnerable to federation denial of service via malformed eventsSynapse is an open source Matrix homeserver implementation. A malicious server can craft events which, when received, prevent Synapse version up to 1.127.0 from federating with other servers. The vulnerability has been exploited in the wild and has been fixed in Synapse v1.127.1. No known workarounds are available. CWE-20Mar 27, 2025 | CVSS7.1v3.1 | EPSS1.18% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2025-27606MEDIUM | Element Android PIN autologout bypassElement Android is an Android Matrix Client provided by Element. Element Android up to version 1.6.32 can, under certain circumstances, fail to logout the user if they input the wrong PIN more than the configured amount of times. An attacker with physical access to a device can exploit this to guess the PIN. Version 1.6.34 solves the issue. CWE-488Mar 14, 2025 | CVSS5.1v3.1 | EPSS0.187% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Synapse unauthenticated writes to the media repository allow planting of problematic contentSynapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. Synapse 1.106 in… CWE-306Dec 3, 2024 | CVSS-v4.0 | EPSS0.419% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
Synapse denial of service through media disk space consumptionSynapse is an open-source Matrix homeserver. Synapse versions before 1.106 are vulnerable to a disk fill attack, where an unauthenticated adversary can induce Synapse to download and cache large amounts of remote media. The default rate limit strategy is insufficient to mitigate this. This can lead to a denial of service, ranging from further media uploads/downloads failing to completely unavailability of the Synapse process, depending on how Synapse was deployed. Synapse 1.106 introduces a new … CWE-770Dec 3, 2024 | CVSS-v4.0 | EPSS0.572% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2024-52805HIGH | Synapse allows unsupported content types to lead to memory exhaustionSynapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Synapse 1.120.1 resolves the issue by denying requests with unsupported multipart/form-data content type. CWE-770Dec 3, 2024 | CVSS8.2v4.0 | EPSS0.709% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-52815HIGH | Synapse allows a a malformed invite to break the invitee's `/sync`Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users. CWE-20Dec 3, 2024 | CVSS8.7v4.0 | EPSS0.543% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-53867MEDIUM | Synapse Matrix has a partial room state leak via Sliding SyncSynapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1. CWE-497Dec 3, 2024 | CVSS4.3v3.1 | EPSS0.427% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-53863HIGH | Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially untrustworthy decodersSynapse is an open-source Matrix homeserver. In Synapse versions before 1.120.1, enabling the dynamic_thumbnails option or processing a specially crafted request could trigger the decoding and thumbnail generation of uncommon image formats, potentially invoking external tools like Ghostscript for processing. This significantly expands the attack surface in a historically vulnerable area, presenting a risk that far outweighs the benefit, particularly since these formats are rarely used on the ope… CWE-434Dec 3, 2024 | CVSS8.2v4.0 | EPSS0.619% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-51750MEDIUM | Element allows a malicious homeserver can modify events leading to unrenderable events or roomsElement is a Matrix web client built using the Matrix React SDK. A malicious homeserver can send invalid messages over federation which can prevent Element Web and Desktop from rendering single messages or the entire room containing them. This was patched in Element Web and Desktop 1.11.85. CWE-248Nov 12, 2024 | CVSS5.0v3.1 | EPSS0.476% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Element's thumbnails can be abused to misrepresent the content of an attachmentElement is a Matrix web client built using the Matrix React SDK. Versions of Element Web and Desktop earlier than 1.11.85 do not check if thumbnails for attachments, stickers and images are coherent. It is possible to add thumbnails to events trigger a file download once clicked. Fixed in element-web 1.11.85. CWE-451Nov 12, 2024 | CVSS3.5v3.1 | EPSS0.33% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2024-47779HIGH | Element Web vulnerable to potential exposure of access token via authenticated mediaElement is a Matrix web client built using the Matrix React SDK. Element Web versions 1.11.70 through 1.11.80 contain a vulnerability which can, under specially crafted conditions, lead to the access token becoming exposed to third parties. At least one vector has been identified internally, involving malicious widgets, but other vectors may exist. Note that despite superficial similarity to CVE-2024-47771, this is an entirely separate vulnerability, caused by a separate piece of code included o… CWE-200Oct 15, 2024 | CVSS7.0v4.0 | EPSS0.435% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-47771HIGH | Element Desktop vulnerable to potential exposure of access token via authenticated mediaElement Desktop is a Matrix client for desktop platforms. Element Desktop versions 1.11.70 through 1.11.80 contain a vulnerability which can, under specially crafted conditions, lead to the access token becoming exposed to third parties. At least one vector has been identified internally, involving malicious widgets, but other vectors may exist. Users are strongly advised to upgrade to version 1.11.81 to remediate the issue. As a workaround, avoid granting permissions to untrusted widgets. CWE-200Oct 15, 2024 | CVSS7.0v4.0 | EPSS0.591% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-31208MEDIUM | Synapse's V2 state resolution weakness allows DoS from remote room membersSynapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.… CWE-770Apr 23, 2024 | CVSS6.5v3.1 | EPSS1.46% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-26132MEDIUM | Element Android can be asked to share internal files.Element Android is an Android Matrix Client. A third-party malicious application installed on the same phone can force Element Android, version 0.91.0 through 1.6.12, to share files stored under the `files` directory in the application's private data directory to an arbitrary room. The impact of the attack is reduced by the fact that the databases stored in this folder are encrypted. However, it contains some other potentially sensitive information, such as the FCM token. Forks of Element Androi… CWE-200Feb 20, 2024 | CVSS4.0v3.1 | EPSS0.387% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |