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TI-2026-53887 Aliases CVE-2026-77144GHSA-fc27-9m9g-625p

Broken Access Control in extension "Events 2" (events2)

Priority LOW 31CWE-915Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Tampering
Confidentiality · integrity · availability
Low · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-915.

Summary

The frontend management plugin attributed a newly created event to the submitting user's organizer record only when the request supplied no organizer of its own. The accompanying permission check confirmed only that the submitting user held any organizer role. A user with frontend event management access could therefore create an event that is attributed to another organizer.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00413 35th percentileScored 2026-11-07
Fix Fixed Extension "Events 2" (TYPO3): 10.2.12, 9.4.2, 8.6.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TYPO3Extension "Events 2"10.0.0 to before 10.2.12; 9.0.0 to before 9.4.2; before 8.6.310.2.12, 9.4.2, 8.6.3Patch availableCNA
  • Extension "Events 2" VendorTYPO3 Affected 10.0.0 to before 10.2.12; 9.0.0 to before 9.4.2; before 8.6.3 Fixed in 10.2.12, 9.4.2, 8.6.3 Patch available CNA

Remediation

  • Fix · CNA Extension "Events 2" (TYPO3) Fixed in 10.2.12, 9.4.2, 8.6.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    TYPO3 Extension "Events 2" — typo3.org/security/advisory/typo3-ext-sa-2026-026

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-53888 Broken Access Control in extension "Events 2" (events2)Priority LOW 31
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77144
  2. 2026-10-03 Alias added: GHSA-fc27-9m9g-625p

References

Advisory 1

  • TI-2023-10314 Persisted Cross-Site Scripting in Frontend Rendering in typo3 CVSS 3.1HIGH 8.8
  • TI-2010-03538 The jumpUrl (aka access tracking) implementation in tslib/class.tslib_fe.php in TYPO3… CVSS 2.0HIGH 7.1
  • TI-2009-00775 The jumpUrl mechanism in class.tslib_fe.php in TYPO3 3.3.x through 3.8.x, 4.0 before… CVSS 2.0MEDIUM 5.0
  • TI-2025-30547 The sr_feuser_register extension through 12.4.8 for TYPO3 allows Remote Code Execution. CVSS 3.1CRITICAL 10.0
  • TI-2019-08867 The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before… CVSS 3.1CRITICAL 9.8
  • TI-2008-04019 Unspecified vulnerability in the TYPO3 Secure Directory (kw_secdir) extension before… CVSS 2.0HIGH 10.0
See all 411 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences