GHSA-cgvv-3455-824j
Moodle Session Fixation allows unauthenticated users to hijack sessions via sesskey parameter
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | moodle/moodle | >= 3.0.0, < 4.0.0 | 4.0.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
A session fixation vulnerability in Moodle 3.x through 3.11.18 allows unauthenticated attackers to hijack user sessions via the sesskey parameter. The sesskey can be obtained without authentication and reused within the OAuth2 login flow, resulting in the victim's session being linked to the attacker's. Successful exploitation results in full account takeover. According to the Moodle Releases page, "Bug fixes for security issues in 3.11.x ended 11 December 2023." NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
References
External links from the advisory. They lead to third-party sites.