Paella Player: Stored XSS via caption cue text

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-77615
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 21:17:38 UTC
Updated2026-09-17 21:17:38 UTC
DescriptionPaella Player is a set of libraries to create a multi stream video player. Prior to Paulla Player 2.12.11 (as used in Opencast prior to 19.7 and 20.2), there is a potential XSS attack though closed captions cue text. This vulnerability is fixed in 2.12.11.

Risk And Classification

Primary CVSS: v3.1 8.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
3.1CNADECLARED8.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Opencast Opencast affected < 19.7 Not specified
CNA Opencast Opencast affected >= 20.0, < 20.2 Not specified
CNA Polimediaupv Paella-player affected < 2.12.11 Not specified

References

ReferenceSourceLinkTags
github.com/opencast/opencast/releases/tag/20.2 [email protected] github.com
github.com/opencast/opencast/releases/tag/19.7 [email protected] github.com
github.com/polimediaupv/paella-core/commit/9b2f14ec4cf55efaf4c045c77a5ed... [email protected] github.com
github.com/polimediaupv/paella-core/commit/94a36490808ac5a1f60a0745d71ec... [email protected] github.com
github.com/polimediaupv/paella-player/commit/6fe4af7306044198c8e91e2e7f4... [email protected] github.com
github.com/opencast/opencast/pull/7736 [email protected] github.com
github.com/opencast/opencast/security/advisories/GHSA-m6c8-jcw2-5r25 [email protected] github.com
github.com/polimediaupv/paella-player/blob/a1b6c42467938a00a4b4d0b8c6843... [email protected] github.com
github.com/opencast/opencast/commit/701682c635f668228c3e8fb7b4564b329478... [email protected] github.com
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