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TYPO3 femanager CVE-2026-77134

| EUVDEUVD-2026-65342 HIGH
Incorrect Authorization (CWE-863)
2026-08-25 TYPO3 GHSA-qj8w-c6hr-59p7
8.3
CVSS 4.0 · Vendor: TYPO3
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Severity by source

Vendor (TYPO3) PRIMARY
8.3 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
9.3 CRITICAL

Network-accessible, no privileges needed; scope changed because bypass grants access to TYPO3 application content outside femanager's own security boundary.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (TYPO3).

CVSS VectorVendor: TYPO3

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Aug 25, 2026 - 11:01 EUVD
Analysis Generated
Aug 25, 2026 - 09:43 vuln.today
CVE Published
Aug 25, 2026 - 09:00 cve.org
HIGH 8.3

DescriptionCVE.org

The extension fails to require the dedicated admin confirmation token when processing an admin-approval request, so a regular user confirmation hash, obtainable by any visitor through the public resend-confirmation action, is sufficient to self-approve a pending account awaiting admin approval.

AnalysisAI

The femanager extension for TYPO3 CMS incorrectly accepts a regular user confirmation hash - obtainable by any visitor via the public resend-confirmation action - in place of the privileged admin confirmation token when processing account-approval requests. This allows a registrant whose account is pending administrator authorization to self-approve that account, fully bypassing the admin-approval gate. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Register account on target TYPO3 site
Delivery
Account enters admin-approval pending state
Exploit
Call public resend-confirmation endpoint
Execution
Retrieve user confirmation hash
Persist
Submit hash to admin-approval handler
Impact
Account self-approved, unauthorized access granted

Vulnerability AssessmentAI

Exploitation The admin-approval workflow feature of the femanager extension must be enabled and configured on the TYPO3 site - sites using femanager without this workflow are not affected. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N) scores 8.3, reflecting remote, unauthenticated exploitation with high confidentiality impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker registers a new account on a TYPO3 site using femanager with admin-approval enabled, placing their account in the pending-approval queue. They then call the public resend-confirmation action to retrieve their own user confirmation hash, and submit that hash to the admin-approval endpoint instead of awaiting an admin-issued token. …
Remediation The primary remediation is to apply the patched femanager release identified in TYPO3 security advisory TYPO3-EXT-SA-2026-024 (https://typo3.org/security/advisory/typo3-ext-sa-2026-024); the exact fixed version is not independently confirmed from the data provided and should be taken directly from that advisory. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: identify all TYPO3 installations running femanager and document version numbers; disable the femanager extension or restrict public access to the resend-confirmation endpoint pending remediation. …

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CVE-2026-77134 vulnerability details – vuln.today

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