CVE-2026-25529

HIGH

8.1

Description

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/12/2026

Last Modified3/19/2026

Sourcenvd

Honeypot Sightings0

Affected Products

postalserver:postal

Weaknesses (CWE)

CWE-79

References

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

IOC Correlations

No correlations recorded

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