Opencast Paella XSS before 17.8/18.2
CVE-2025-61788 Published on October 8, 2025
Opencast Paella Player 7 vulnerable to Cross-Site-Scripting
Opencast is a free, open-source platform to support the management of educational audio and video content. Prior to Opencast 17.8 and 18.2, the paella would include and render some user inputs (metadata like title, description, etc.) unfiltered and unmodified. The vulnerability allows attackers to inject and malicious HTML and JavaScript in the player, which would then be executed in the browsers of users watching the prepared media. This can then be used to modify the site or to execute actions in the name of logged-in users. To inject malicious metadata, an attacker needs write access to the system. For example, the ability to upload media and modify metadata. This cannot be exploited by unauthenticated users. This issue is fixed in Opencast 17.8 and 18.2.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2025-61788 has been classified to as a XSS vulnerability or weakness.
Affected Versions
opencast:- Version < 17.8 is affected.
- Version >= 18.0, < 18.2 is affected.
Vulnerable Packages
The following package name and versions may be associated with CVE-2025-61788
| Package Manager | Vulnerable Package | Versions | Fixed In |
|---|---|---|---|
| maven | org.opencastproject:opencast-common | <= 16.10 |
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.