CVE-2026-25529
HIGHPostal < 3.3.5 - Stored Cross-Site Scripting via Admin Interface HTML Injection
Title source: llmDescription
Postal is an open source SMTP server. Postal versions less than 3.3.5 had a HTML injection vulnerability that allowed unescaped data to be included in the admin interface. The primary way for unescaped data to be added is via the API's "send/raw" method. This could allow arbitrary HTML to be injected in to the page which may modify the page in a misleading way or allow for unauthorised javascript to be executed. Fixed in 3.3.5 and higher.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://github.com/postalserver/postal/security/advisories/GHSA-5f4r-5jpr-rfhc
Scores
CVSS v3
8.1
EPSS
0.0024
EPSS Percentile
14.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (1)
postalserver/postal
< 3.3.5
Published
Mar 12, 2026
Tracked Since
Mar 13, 2026