CVE-2026-77615

Paella Player: Stored XSS via caption cue text

HIGH
8.7
CVSS Score
Published: September 17, 2026 at 08:51 PM UTC
Updated: September 24, 2026 at 09:37 PM UTC
2 products affected across 2 vendorsOpencastPaella Player

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Severity
HIGH8.7
Exploit prediction
EPSS 0.6%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 19.7v < 20.2
Affected range stops below 19.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 20.2, so it looks safe — our inference, not a vendor statement
v < 2.12.11
Affected range stops below 2.12.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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