CVE-2026-77615
Paella Player: Stored XSS via caption cue text
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
Paella 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.
| CWE | CWE-79 |
| Vendor | opencast |
| Product | opencast |
| Published | Sep 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
opencast / opencast
< 19.7 >= 20.0, < 20.2
polimediaupv / paella-player
< 2.12.11
References
github.com: https://github.com/opencast/opencast/security/advisories/GHSA-m6c8-jcw2-5r25 github.com: https://github.com/opencast/opencast/pull/7736 github.com: https://github.com/opencast/opencast/commit/701682c635f668228c3e8fb7b4564b3294788e40 github.com: https://github.com/polimediaupv/paella-core/commit/94a36490808ac5a1f60a0745d71ec9253f6d206b github.com: https://github.com/polimediaupv/paella-core/commit/9b2f14ec4cf55efaf4c045c77a5ed8f5ec559ab4 github.com: https://github.com/polimediaupv/paella-player/commit/6fe4af7306044198c8e91e2e7f4128428b83cf03 github.com: https://github.com/opencast/opencast/releases/tag/19.7 github.com: https://github.com/opencast/opencast/releases/tag/20.2 github.com: https://github.com/polimediaupv/paella-player/blob/a1b6c42467938a00a4b4d0b8c68435cd4f9d2a16/repos/paella-core/CHANGELOG.md?plain=1#L21