CVE-2025-24856
TYPO3-EXT-SA-2025-001: Account Takeover in extension "OpenID Connect Authentication" (oidc)
Impact
## 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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | causal/oidc | >= 3.0.0, < 4.0.0 | 4.0.0 |
Affected products
| Product | Affected versions |
|---|---|
| Oidc (Aka OpenID Connect Authentication) Extension | before 4.0.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/xperseguers/t3ext-oidc/commit/877e09f6faf4c87bbb41233112ec7e30d3c902b3
- https://typo3.org/security/advisory/typo3-ext-sa-2025-001
- https://github.com/advisories/GHSA-hj78-p4h7-m5fv
- https://github.com/FriendsOfPHP/security-advisories/blob/master/causal/oidc/CVE-2025-24856.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2025-24856