matrix-react-sdk vulnerable to XSS in Export Chat feature
Description
The Export Chat feature includes certain attacker-controlled elements in the generated document without sufficient escaping, leading to stored XSS.
Impact
Since the Export Chat feature generates a separate document, an attacker can only inject code run from the null origin, restricting the impact.
However, the attacker can still potentially use the XSS to leak message contents. A malicious homeserver is a potential attacker since the affected inputs are controllable server-side.
Patches
This was patched in matrix-react-sdk 3.76.0.
Workarounds
None, other than not using the Export Chat feature.
References
N/A
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | matrix-react-sdk | >= 3.32.0, < 3.76.0 | 3.76.0 |
References
- https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-c9vx-2g7w-rp65
- https://nvd.nist.gov/vuln/detail/CVE-2023-37259
- https://github.com/matrix-org/matrix-react-sdk/commit/22fcd34c606f32129ebc967fc21f24fb708a98b8
- https://github.com/matrix-org/matrix-react-sdk
- https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.76.0
- CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N- Weakness (CWE)
CWE-79, CWE-80- Platform
- npm
- Package
matrix-react-sdk- Disclosed
- 18.07.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-c9vx-2g7w-rp65 - CC BY 4.0
Vulnerability history: matrix-react-sdk
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 03.2021 10.2024
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 3
- Low 1
Disclosures per year
- 2021: 2
- 2022: 0
- 2023: 4
- 2024: 2
- 2025: 0
- 2026: 0
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matrix-react-sdk vulnerable to XSS in Export Chat feature this entry
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