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CVE-2026-55879— OpenReplay: Unauthenticated stored XSS leads to dashboard account takeover

CVSS 9.3 · Critical EPSS 0.27% · P19

Affected Version Matrix 1

VendorProductVersion RangeStatus
openreplayopenreplay>= 1.24.0, < 1.25.0affected
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I. Basic Information for CVE-2026-55879

Vulnerability Information
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Vulnerability Title
OpenReplay: Unauthenticated stored XSS leads to dashboard account takeover
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
openreplayopenreplay >= 1.24.0, < 1.25.0 -

II. Public POCs for CVE-2026-55879

#POC DescriptionSource LinkShenlong Link
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Qwen3.6-35B-A3B · 6996 chars
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III. Intelligence Information for CVE-2026-55879

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Patches & Fixes for CVE-2026-55879 (1)

Vendor Advisories for CVE-2026-55879 (1)

Vendor Pages for CVE-2026-55879 (1)

Same Patch Batch · openreplay · 2026-07-10 · 4 CVEs total

CVE-2026-558807.1 HIGHOpenReplay: Cross-user IDOR in notes and dashboard widgets
CVE-2026-572305.4 MEDIUMOpenReplay: Authenticated ClickHouse SQL injection via session search
CVE-2026-55881OpenReplay: Cross-tenant session replay disclosure via missing session ownership check in

IV. Related Vulnerabilities

Same product: openreplay
Same vendor: openreplay
Same weakness: CWE-79

V. Comments for CVE-2026-55879

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