CVE-2026-25529 — Postal has HTML injection / XSS in message view

CVE-2026-25529

Postal has HTML injection / XSS in message view PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
postalserver / postal	affected < 3.3.5

CWE

CWE-79

References

https://github.com/postalserver/postal/security/advisories/GHSA-5f4r-5jpr-rfhc

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.