Broken Access Control in extension "Events 2" (events2)
Priority LOW 31CWE-639Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
The permission check for the frontend management update flow verified a different event than the one the request went on to modify. A user with frontend event management access could therefore modify events belonging to other organizers.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00351 28th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| TYPO3 | Extension "Events 2" | 10.0.0 to before 10.2.12; 9.0.0 to before 9.4.2; before 8.6.3 | 10.2.12, 9.4.2, 8.6.3 | Patch available | CNA |
- 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-2026-53887 Broken Access Control in extension "Events 2" (events2)Priority LOW 31
Timeline
- 2026-10-02 Threatist record created from CVE-2026-77145
- 2026-10-03 Alias added: GHSA-4f49-557j-w78c
References
More TYPO3 vulnerabilities
- 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
Sources
- CVE-2026-77145 · CVE Program
- CVE-2026-77145 · NVD
- FIRST EPSS
- GHSA-4f49-557j-w78c · GitHub Advisory Database · CC BY 4.0
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