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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-m2vg-rmq6-p62r Opencast's Paella Player 7 is vulnerable to Cross-Site Scripting
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 10 Oct 2025 01:15:00 +0900

Type Values Removed Values Added
First Time appeared Apereo
Apereo opencast
CPEs cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:*
Vendors & Products Apereo
Apereo opencast
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}


Thu, 09 Oct 2025 22:00:00 +0900

Type Values Removed Values Added
First Time appeared Opencast
Opencast opencast
Vendors & Products Opencast
Opencast opencast

Thu, 09 Oct 2025 04:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 09 Oct 2025 03:15:00 +0900

Type Values Removed Values Added
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.
Title Opencast Paella Player 7 vulnerable to Cross-Site-Scripting
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 5.1, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-10-08T18:26:13.505Z

Reserved: 2025-09-30T19:43:49.903Z

Link: CVE-2025-61788

cve-icon Vulnrichment

Updated: 2025-10-08T18:26:06.562Z

cve-icon NVD

Status : Analyzed

Published: 2025-10-08T18:15:35.407

Modified: 2025-10-09T16:00:05.127

Link: CVE-2025-61788

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-10-09T21:51:32Z

Weaknesses