Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Moodle (moodle/moodle) versions before 3.9.8, from 3.10.0-beta before 3.10.5, and from 3.11.0-beta before 3.11.1 are affected. In some circumstances, email notifications of messages could hide the link back to the original message behind HTML, which may enable phishing. The source gives few details about the attacker's required access. Upgrade to 3.9.8, 3.10.5, 3.11.1, or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0053, the 44th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:32 UTC First seen by agentprime
- 31 Oct 2026, 14:32 UTC Confirmed by OSV