CVE-2025-61788

Description

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. ### Impact 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. ### Patches This issue is fixed in Opencast 17.8 and 18.2, however they are not published to the Maven registry. ### Resources - [Patch fixing the issue](https://github.com/opencast/opencast/commit/2809520fa88d108d8104c760f00c10bad42c14f9) ### For more information If you have any questions or comments about this advisory: * Open an issue in [our issue tracker](https://github.com/opencast/opencast/issues) * Email us at [security@opencast.org](mailto:security@opencast.org)

How to fix CVE-2025-61788

No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.

• —no fix listed

Is CVE-2025-61788 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, <= 16.10

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-61788
• PATCHgithub.com/opencast/opencast
• WEBgithub.com/opencast/opencast/commit/2809520fa88d108d8104c760f00c10bad42c14f9
• WEBgithub.com/opencast/opencast/security/advisories/GHSA-m2vg-rmq6-p62r