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CVE-2026-120329VulnerabilityPublished

Saving the configuration of the mail backend module writes submitted settings to the page TSconfig without restricting

Source GCVE Database

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Authoritative record:CVE-2026-120329· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 4.2.0 or 3.12.5 when convenient.

Data as of 3 Nov 2026, 13:30 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (TYPO3)CVSS 4.05.3
Patch
Available – fixed in 4.2.0, 3.12.5
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.

What to do

Upgrade Extension "Mail" and mediaessenz/mail to 4.2.0 or 3.12.5.

Affected software

ProductAffectedFixed in
Extension "Mail"mediaessenz/mailAffected
  • >=4.0.0 <4.2.0
Fixed in
  • 4.2.0
Extension "Mail"mediaessenz/mailAffected
  • <3.12.5
Fixed in
  • 3.12.5
Packagistmediaessenz/mailpkg:composer/mediaessenz/mailOther threatsAffected
  • >=4.0.0 <4.2.0
  • <3.12.5
Fixed in
  • 4.2.0
  • 3.12.5

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, restrict backend user access to the mail module to trusted administrators only to minimize risk.

Description

A vulnerability exists in the mail backend module configuration saving process where submitted settings are written to the page TSconfig without proper restriction. This allows backend users with access to the mail module to write arbitrary page TSconfig entries, potentially leading to unauthorized configuration changes. The issue has a medium severity with a CVSS score of 5.3.

References

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