CVE-2026-55879CWE-79

OpenReplay: Unauthenticated stored XSS leads to dashboard account takeover

Critical · published July 10, 2026

CVSS v3.1
9.3
EPSS
0%
Percentile
41.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00499 · 41.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-10T20:39Z
EPSS history
Timeline
  • 10 JUL 20:39Z
    OpenReplay: Unauthenticated stored XSS leads to dashboard account takeover
    cvelistv5