TYPO3-EXT-SA-2025-001: Account Takeover in extension "OpenID Connect Authentication" (oidc)
Problem Description
A vulnerability in the account linking logic of the extension allows a pre-hijacking attack leading to Account Takeover. The attack can only be exploited if the following requirements are met:
- An attacker can anticipate the email address of the user.
- An attacker can register a public frontend user account using that email address before the user's first OIDC login.
- The IDP returns the field email containing the email address of the user
Solution
An updated versions 4.0.0 is available from the TYPO3 extension manager, packagist and at https://extensions.typo3.org/extension/download/oidc/4.0.0/zip
Users of the extension are advised to update the extension as soon as possible.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | causal/oidc | >= 3.0.0, < 4.0.0 | 4.0.0 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-288, CWE-348, CWE-639- Platform
- Composer
- Package
causal/oidc- Disclosed
- 28.01.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-hj78-p4h7-m5fv - CC BY 4.0
Vulnerability history: causal/oidc
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 04.2024 01.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 1
- 2026: 0
-
TYPO3-EXT-SA-2025-001: Account Takeover in extension "OpenID Connect Authentication" (oidc) this entry
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