CVE-2026-77128

Broken Access Control in extension "Event management and registration" (sf_event_mgt)

MEDIUM

6.3

CVSS Score

Published: August 25, 2026 at 09:00 AM UTC

Updated: August 26, 2026 at 05:31 PM UTC

2 products affected across 2 vendorsEvent Management and RegistrationEvent management and registration

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Severity

MEDIUM6.3

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

The extension fails to enforce enable-field restrictions on a repository query parameter. An unauthenticated remote user can pass a demand-override parameter to view hidden or time-restricted events, unless the disableOverrideDemand plugin setting is active. Exploitation of this issue requires only that disableOverrideDemand is not enabled.

Affected

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

Event Management and Registration · Derhansentypo3

75%

All versions

Event management and registration · TYPO3composer

60%

v < 5.9.36.0.0 ≤ v < 6.7.27.0.0 ≤ v < 7.9.38.0.0 ≤ v < 8.6.29.0.0 ≤ v < 9.0.36.0.0 7.0.0 8.0.0 9.0.0

Affected range stops below 5.9.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.7.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.9.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.0.3, 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

https://typo3.org/security/advisory/typo3-ext-sa-2026-023

References (1)

Vendor Advisory

Source: cverecord

https://typo3.org/security/advisory/typo3-ext-sa-2026-023

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.3MEDIUMTYPO3

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-862

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