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.
Advisories

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Fixes

Solution

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Workaround

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History

Thu, 12 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 12 Mar 2026 17:00:00 +0000

Type Values Removed Values Added
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.
Title Postal has HTML injection / XSS in message view
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-12T17:57:37.553Z

Reserved: 2026-02-02T19:59:47.373Z

Link: CVE-2026-25529

cve-icon Vulnrichment

Updated: 2026-03-12T17:57:31.875Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-12T17:16:46.953

Modified: 2026-03-12T21:07:53.427

Link: CVE-2026-25529

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses