TI-2025-18565 Aliases CVE-2025-24856 GHSA-hj78-p4h7-m5fv

Authentication bypass in TYPO3 oidc

LOW 19CWE-348Published 2025-03-16 · Updated 2025-03-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-288.

Summary

An issue was discovered in the oidc (aka OpenID Connect Authentication) extension before 4.0.0 for TYPO3. The account linking logic allows a pre-hijacking attack, leading to Account Takeover. The attack can only be exploited if the following requirements are met: (1) an attacker can anticipate the e-mail address of the user, (2) an attacker can register a public frontend user account using that e-mail address before the user's first OIDC login, and (3) the IDP returns an email field containing the e-mail address of the user,

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00182 7th percentileScored 2026-11-07

Fix Fixed oidc (TYPO3): 4.0.0causal/oidc (Packagist): 4.0.0

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	oidc	before 4.0.0	4.0.0	Patch available	CNA
—	causal/oidc (Packagist)	3.0.0 to before 4.0.0	4.0.0	Patch available	GHSA-hj78-p4h7-m5fv

oidc VendorTYPO3 Affected before 4.0.0 Fixed in 4.0.0 Patch available CNA
causal/oidc (Packagist) Vendor— Affected 3.0.0 to before 4.0.0 Fixed in 4.0.0 Patch available GHSA-hj78-p4h7-m5fv

Remediation

Fix · CNA oidc (TYPO3) Fixed in 4.0.0
Fix · GHSA-hj78-p4h7-m5fv causal/oidc (Packagist) Fixed in 4.0.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-24856
2026-10-03 Alias added: GHSA-hj78-p4h7-m5fv

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-24856

Other 3

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

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