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CVE-2026-77145

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

HIGH
7.1
CVSS Score
Published: August 25, 2026 at 09:00 AM UTC
Updated: September 28, 2026 at 11:10 PM UTC
1 product affected across 1 vendorEVENTS2

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Severity
HIGH7.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EVENTS2· TYPO3composer
60%
v < 8.6.310.0.0 ≤ v < 10.2.129.0.0 ≤ v < 9.4.210.0.09.0.0
Affected range stops below 10.2.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.6.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.4.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://typo3.org/security/advisory/typo3-ext-sa-2026-026

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHTYPO3
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-639

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