Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Jenkins Extensible Choice Parameter Plugin versions 239.v5f5c278708cf and earlier are vulnerable. An attacker can use cross-site request forgery, because an HTTP endpoint does not require POST requests, to cause a user's browser to execute sandboxed Groovy code. No fix is listed.
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 |
|---|---|---|---|---|
| 5.4 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0026, the 17th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:09 UTC First seen by agentprime
- 31 Oct 2026, 15:09 UTC Confirmed by OSV