Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The Bitbucket Server Integration Plugin for Jenkins, versions 2.1.0 through 4.1.3, is affected. Its implementation of a Jenkins extension point disables CSRF protection too broadly, so an attacker can craft URLs that bypass CSRF protection on any target URL. The source does not say what an attacker can then do or what preconditions apply. Upgrade to version 4.1.4, which restricts CSRF protection to only the URLs that need it.
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 |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0030, the 23rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:11 UTC First seen by agentprime
- 31 Oct 2026, 15:11 UTC Confirmed by OSV