Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The xwiki-platform-webjars-api Maven package is vulnerable to path traversal in versions from 9.6-rc-1 up to 16.10.17, from 17.0.0-rc-1 up to 17.4.9, and from 17.5.0-rc-1 up to 17.10.3. An attacker who already has admin rights on at least one subwiki and can get a malicious WebJar extension installed, through a configured extension repository, could write arbitrary files, possibly overwriting configuration or the superadmin password. Upgrade to 16.10.17, 17.4.9, 17.10.3, or 18.0.0RC1; the source lists no workaround beyond limiting script and admin rights.
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 |
|---|---|---|---|---|
| 5.9 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0065, the 51st 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