Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Opencast's Paella Player 7 in the opencast-common Maven package, versions up to and including 16.10, renders user-supplied metadata such as title and description without filtering. An attacker with write access to the system, for example one who can upload media and edit its metadata, can inject HTML and JavaScript that runs in the browsers of viewers. No fixed version is listed for this package; the source says the fixes in Opencast 17.8 and 18.2 are not published to Maven.
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 |
|---|---|---|---|---|
| 5.1 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0022, the 12th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:10 UTC First seen by agentprime
- 31 Oct 2026, 15:10 UTC Confirmed by OSV