Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Jenkins Bitbucket OAuth Plugin 0.17 and earlier does not restrict the redirect URL after login, so an attacker can craft a Jenkins link that sends users to another site after they authenticate, enabling phishing. The source gives few details about the exact conditions required. Upgrade to version 0.18 or later, which only redirects to relative Jenkins URLs.
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 |
|---|---|---|---|---|
| 4.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0021, the 10th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:20 UTC First seen by agentprime
- 31 Oct 2026, 14:20 UTC Confirmed by OSV