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Vulnerability record · CVE-2026-55879 · published 10 July 2026

CVE-2026-55879: Cross-site scripting vulnerability

OpenReplay is a self-hosted session replay suite. From 1.24.0 before 1.25.0, the OpenReplay tracking SDK accepts custom event names and captured page URLs from any visitor using a public project key, stores them in ClickHouse without output encoding, and later renders them in the authenticated dashboard through TextEllipsis and the event-details modal, allowing an unauthenticated attacker to store script that executes in the dashboard origin, reads the session JWT from localStorage, and takes over a dashboard account. This issue is fixed in version 1.25.0.

9.3 CVSS 3.1 Critical EPSS 0.50% · top 59.7% CWE-79 · Cross-site scripting Deferred
9.3CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
13 Jul 2026Last modified by NVD

Description

OpenReplay is a self-hosted session replay suite. From 1.24.0 before 1.25.0, the OpenReplay tracking SDK accepts custom event names and captured page URLs from any visitor using a public project key, stores them in ClickHouse without output encoding, and later renders them in the authenticated dashboard through TextEllipsis and the event-details modal, allowing an unauthenticated attacker to store script that executes in the dashboard origin, reads the session JWT from localStorage, and takes over a dashboard account. This issue is fixed in version 1.25.0.

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

References

LinkTags
https://github.com/openreplay/openreplay/commit/ec41f4425a99c478a4418adbd2f094ab6a8b0daf
https://github.com/openreplay/openreplay/releases/tag/v1.25.0
https://github.com/openreplay/openreplay/security/advisories/GHSA-3mfc-7hf4-jfxh

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Source: NIST National Vulnerability Database (record CVE-2026-55879), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.