Potential XSS Vulnerability in Paella Player Used with Opencast
CVE-2026-77615

8.7HIGH

Key Information:

Vendor

Opencast

Status
Opencast
Paella-player
Vendor
CVE Published:
17 September 2026

What is CVE-2026-77615?

A potential Cross-Site Scripting (XSS) vulnerability exists in Paella Player, which is utilized by Opencast prior to version 19.7 and 20.2. The vulnerability arises through closed captions cue text, allowing attackers to execute arbitrary JavaScript in the context of the user's browser. This issue has been addressed in version 2.12.11 of Paella Player, emphasizing the importance of keeping software up-to-date to mitigate security risks.

Affected Version(s)

opencast < 19.7 < 19.7

opencast >= 20.0, < 20.2 < 20.0, 20.2

paella-player < 2.12.11

References

https://github.com/opencast/opencast/security/advisories/...
x_refsource_CONFIRM
https://github.com/opencast/opencast/pull/7736
x_refsource_MISC
https://github.com/opencast/opencast/commit/701682c635f66...
x_refsource_MISC

CVSS V3.1

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.