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TI-2026-54099 Aliases CVE-2026-77615GHSA-m6c8-jcw2-5r25

Paella Player: Stored XSS via caption cue text

Priority HIGH 73CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00559 46th percentileScored 2026-11-07
Fix Fixed opencast (opencast): 19.7, 20.2paella-player (polimediaupv): 2.12.11+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
opencastopencastbefore 19.7; 20.0 to before 20.219.7, 20.2Patch availableCNA
polimediaupvpaella-playerbefore 2.12.112.12.11Patch availableCNA
—org.opencastproject:opencast-engage-paella-player-7 (Maven)before 19.719.7Patch availableGHSA-m6c8-jcw2-5r25
—org.opencastproject:opencast-engage-paella-player-7 (Maven)20.0 to before 20.220.2Patch availableGHSA-m6c8-jcw2-5r25
—paella-core (npm)before 1.50.61.50.6Patch availableGHSA-m6c8-jcw2-5r25
  • opencast Vendoropencast Affected before 19.7; 20.0 to before 20.2 Fixed in 19.7, 20.2 Patch available CNA
  • paella-player Vendorpolimediaupv Affected before 2.12.11 Fixed in 2.12.11 Patch available CNA
  • org.opencastproject:opencast-engage-paella-player-7 (Maven) Vendor— Affected before 19.7 Fixed in 19.7 Patch available GHSA-m6c8-jcw2-5r25
  • org.opencastproject:opencast-engage-paella-player-7 (Maven) Vendor— Affected 20.0 to before 20.2 Fixed in 20.2 Patch available GHSA-m6c8-jcw2-5r25
  • paella-core (npm) Vendor— Affected before 1.50.6 Fixed in 1.50.6 Patch available GHSA-m6c8-jcw2-5r25

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:*——Apereo
  • cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:* Versions — — ·Apereo

Remediation

  • Fix · CNA opencast (opencast) Fixed in 19.7, 20.2
  • Fix · CNA paella-player (polimediaupv) Fixed in 2.12.11
  • Fix · GHSA-m6c8-jcw2-5r25 org.opencastproject:opencast-engage-paella-player-7 (Maven) Fixed in 19.7 Advisory →
  • Fix · GHSA-m6c8-jcw2-5r25 org.opencastproject:opencast-engage-paella-player-7 (Maven) Fixed in 20.2 Advisory →
  • Fix · GHSA-m6c8-jcw2-5r25 paella-core (npm) Fixed in 1.50.6 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77615
  2. 2026-10-03 Alias added: GHSA-m6c8-jcw2-5r25

References

Advisory 1

Other 10

  • TI-2026-54098 Opencast: Session fixation in login enables account takeover via crafted link CVSS 3.1HIGH 8.8
  • TI-2021-19627 Files Accessible to External Parties in Opencast CVSS 3.1CRITICAL 9.9
  • TI-2025-38256 Opencast's editor accidentally publishes videos/overwrites publications #1626 CVSS 4.0LOW 2.3
  • TI-2020-04262 Authentication Bypass For Endpoints With Anonymous Access in OpenCast CVSS 3.1CRITICAL 10.0
  • TI-2017-14534 Opencast 2.3.2 and older versions are vulnerable to script injections through media and… CVSS 3.0HIGH 8.8
  • TI-2020-04278 Hard-Coded Key Used For Remember-me Token in OpenCast CVSS 3.1HIGH 8.8
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences