What’s Vulnerable › Vulnerabilities

CVE-2026-77615: Paella Player: Stored XSS via caption cue text

• Severity: high (CVSS 8.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-09-24
• Weakness: CWE-79

Description

Paella Player is a set of libraries to create a multi stream video player. Prior to Paella 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.

Affected products

• opencast: before 19.7; from 20.0, < 20.2
• polimediaupv paella-player: before 2.12.11

References

• https://github.com/opencast/opencast/commit/701682c635f668228c3e8fb7b4564b3294788e40
• https://github.com/opencast/opencast/pull/7736
• https://github.com/opencast/opencast/releases/tag/19.7
• https://github.com/opencast/opencast/releases/tag/20.2
• https://github.com/opencast/opencast/security/advisories/GHSA-m6c8-jcw2-5r25
• https://github.com/polimediaupv/paella-core/commit/94a36490808ac5a1f60a0745d71ec9253f6d206b
• https://github.com/polimediaupv/paella-core/commit/9b2f14ec4cf55efaf4c045c77a5ed8f5ec559ab4
• https://github.com/polimediaupv/paella-player/blob/a1b6c42467938a00a4b4d0b8c68435cd4f9d2a16/repos/paella-core/CHANGELOG.md?plain=1#L21
• https://github.com/polimediaupv/paella-player/commit/6fe4af7306044198c8e91e2e7f4128428b83cf03
• https://github.com/opencast/opencast/security/advisories/GHSA-m6c8-jcw2-5r25

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