CVE-2026-120331

MEDIUMCVSS 5.3/10EPSS 0.35%

Last modified

CVE-2026-120331 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Content of external URL mails, their stylesheets and images to embed is fetched by the server without validating the target host. Backend users with access to the mail module can make the server send requests to hosts in the internal network.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

Content of external URL mails, their stylesheets and images to embed is fetched by the server without validating the target host. Backend users with access to the mail module can make the server send requests to hosts in the internal network.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
TYPO3Extension "Mail">= 4.0.0, < 4.2.0; < 3.12.5

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-120331?
Content of external URL mails, their stylesheets and images to embed is fetched by the server without validating the target host. Backend users with access to the mail module can make the server send requests to hosts in the internal network.
How severe is CVE-2026-120331?
CVE-2026-120331 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.
How do I fix CVE-2026-120331?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST