Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
OpenCMS (org.opencms:opencms-core) versions up to and including 17.0 are affected by a stored cross-site scripting vulnerability. An attacker who can submit content through the image parameter of the Create/Modify article function can inject a crafted payload that runs arbitrary scripts or HTML in the browsers of users who view it. No fixed version 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:L/UI:R/S:C/C:L/I:L/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0027, the 19th percentile, on 13 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