CVE-2024-34357: TYPO3 vulnerable to Cross-Site Scripting in ShowImageController

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-14 · updated 2026-06-17
Weakness: CWE-79

Description

TYPO3 is an enterprise content management system. Starting in version 9.0.0 and prior to versions 9.5.48 ELTS, 10.4.45 ELTS, 11.5.37 LTS, 12.4.15 LTS, and 13.1.1, failing to properly encode user-controlled values in file entities, the `ShowImageController` (`_eID tx_cms_showpic_`) is vulnerable to cross-site scripting. Exploiting this vulnerability requires a valid backend user account with access to file entities. TYPO3 versions 9.5.48 ELTS, 10.4.45 ELTS, 11.5.37 LTS, 12.4.15 LTS, 13.1.1 fix the problem described.

Affected products

typo3: from 9.0.0 before 9.5.48; from 10.0.0 before 10.4.45; from 11.0.0 before 11.5.37; from 12.0.0 before 12.4.15; from 13.0.0 before 13.1.1 — fixed in 10.4.45, 11.5.37, 12.4.15, 13.1.1, 9.5.48

How to fix

Upgrade to a fixed version: typo3 10.4.45, 11.5.37, 12.4.15, 13.1.1. Check the vendor advisory for mitigations.

References

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