Packagist Package Vulnerabilities
Vulnerabilities associated with flarum/core.
Packages
Clear package- moodle/moodle437 vulnerabilities
- magento/community-edition362 vulnerabilities
- typo3/cms188 vulnerabilities
- magento/project-community-edition161 vulnerabilities
- wwbn/avideo144 vulnerabilities
- pimcore/pimcore132 vulnerabilities
- craftcms/cms128 vulnerabilities
- typo3/cms-core127 vulnerabilities
- dolibarr/dolibarr126 vulnerabilities
- concrete5/concrete5119 vulnerabilities
- drupal/core109 vulnerabilities
- phpmyadmin/phpmyadmin107 vulnerabilities
- thorsten/phpmyfaq106 vulnerabilities
- microweber/microweber105 vulnerabilities
- librenms/librenms101 vulnerabilities
- symfony/symfony100 vulnerabilities
- silverstripe/framework90 vulnerabilities
- drupal/drupal81 vulnerabilities
- mantisbt/mantisbt74 vulnerabilities
- shopware/platform74 vulnerabilities
- getgrav/grav69 vulnerabilities
- shopware/core65 vulnerabilities
- snipe/snipe-it57 vulnerabilities
- baserproject/basercms56 vulnerabilities
- mautic/core56 vulnerabilities
| Vulnerability | Title and context | CVSS | EPSS | PoCs | Signals | STIX action |
|---|---|---|---|---|---|---|
CVE-2026-41887MEDIUM | Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)Flarum is open-source forum software. Prior to versions 1.8.16 and 2.0.0-rc.1, Flarum's patch for CVE-2023-27577 restricted the @import and data-uri() LESS features in the custom_less setting, but the same restriction was never applied to other settings registered as LESS config variables (for example theme_primary_color and theme_secondary_color, as well as any key registered via Extend\Settings::registerLessConfigVar()). Those values are interpolated verbatim into the LESS source at compile ti… | CVSS4.9v3.1 | EPSS0.404% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2025-27794MEDIUM | Flarum Vulnerable to Session Hijacking via Authoritative Subdomain Cookie OverwriteFlarum is open-source forum software. A session hijacking vulnerability exists in versions prior to 1.8.10 when an attacker-controlled authoritative subdomain under a parent domain (e.g., `subdomain.host.com`) sets cookies scoped to the parent domain (`.host.com`). This allows session token replacement for applications hosted on sibling subdomains (e.g., `community.host.com`) if session tokens aren't rotated post-authentication. Key Constraints are that the attacker must control any subdomain un… CWE-74Mar 12, 2025 | CVSS6.8v3.1 | EPSS0.483% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2024-21641MEDIUM | Flarum's Logout Route allows open redirectsFlarum is open source discussion platform software. Prior to version 1.8.5, the Flarum `/logout` route includes a redirect parameter that allows any third party to redirect users from a (trusted) domain of the Flarum installation to redirect to any link. For logged-in users, the logout must be confirmed. Guests are immediately redirected. This could be used by spammers to redirect to a web address using a trusted domain of a running Flarum installation. The vulnerability has been fixed and publi… | CVSS6.5v3.1 | EPSS1.07% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware use1 Nuclei template | STIX |
CVE-2023-40033HIGH | Server-Side Request Forgery via Avatar upload in flarumFlarum is an open source forum software. Flarum is affected by a vulnerability that allows an attacker to conduct a Blind Server-Side Request Forgery (SSRF) attack or disclose any file on the server, even with a basic user account on any Flarum forum. By uploading a file containing a URL and spoofing the MIME type, an attacker can manipulate the application to execute unintended actions. The vulnerability is due to the behavior of the `intervention/image` package, which attempts to interpret the… | CVSS7.1v3.1 | EPSS0.421% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2023-27577MEDIUM | Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files in flarumflarum is a forum software package for building communities. In versions prior to 1.7.0 an admin account which has already been compromised by an attacker may use a vulnerability in the `LESS` parser which can be exploited to read sensitive files on the server through the use of path traversal techniques. An attacker can achieve this by providing an absolute path to a sensitive file in the custom `LESS` setting, which the `LESS` parser will then read. For example, an attacker could use the follo… CWE-22Mar 10, 2023 | CVSS6.6v3.1 | EPSS0.851% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
Flarum is missing authorization in discussion repliesFlarum is a discussion platform for websites. If the first post of a discussion is permanently deleted but the discussion stays visible, any actor who can view the discussion is able to create a new reply via the REST API, no matter the reply permission or lock status. This includes users that don't have a validated email. Guests cannot successfully create a reply because the API will fail with a 500 error when the user ID 0 is inserted into the database. This happens because when the first post… CWE-862Jan 13, 2023 | CVSS3.5v3.1 | EPSS0.555% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX | |
CVE-2023-22488MEDIUM | Missing authorization in FlarumFlarum is a forum software for building communities. Using the notifications feature, one can read restricted/private content and bypass access checks that would be in place for such content. The notification-sending component does not check that the subject of the notification can be seen by the receiver, and proceeds to send notifications through their different channels. The alerts do not leak data despite this as they are listed based on a visibility check, however, emails are still sent out… CWE-862Jan 12, 2023 | CVSS6.8v3.1 | EPSS0.397% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2022-41938CRITICAL | Cross site scripting vulnerability with discussion titles in flarumFlarum is an open source discussion platform. Flarum's page title system allowed for page titles to be converted into HTML DOM nodes when pages were rendered. The change was made after `v1.5` and was not noticed. This allowed an attacker to inject malicious HTML markup using a discussion title input, either by creating a new discussion or renaming one. The XSS attack occurs after a visitor opens the relevant discussion page. All communities running Flarum from `v1.5.0` to `v1.6.1` are impacted. … CWE-79Nov 19, 2022 | CVSS9.0v3.1 | EPSS0.68% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |
CVE-2021-32671CRITICAL | XSS vulnerability with translatorFlarum is a forum software for building communities. Flarum's translation system allowed for string inputs to be converted into HTML DOM nodes when rendered. This change was made after v0.1.0-beta.16 (our last beta before v1.0.0) and was not noticed or documented. This allowed for any user to type malicious HTML markup within certain user input fields and have this execute on client browsers. The example which led to the discovery of this vulnerability was in the forum search box. Entering faux-… CWE-79Jun 7, 2021 | CVSS10.0v3.1 | EPSS39.7% | PoCs0 | SignalsNot listed in CISA KEVNo known ransomware useNo Nuclei templates | STIX |