CVE-2023-37259
Cross site scripting in Export Chat feature
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
matrix-react-sdk is a react-based SDK for inserting a Matrix chat/voip client into a web page. The Export Chat feature includes certain attacker-controlled elements in the generated document without sufficient escaping, leading to stored Cross site scripting (XSS). 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. This issue has been addressed in commit `22fcd34c60` which is included in release version 3.76.0. Users are advised to upgrade. The only known workaround for this issue is to disable or to not use the Export Chat feature.
Timeline
ID reserved
By GitHub_M
- 19 days later
· 19 days later
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.1 | CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.45% · top 60% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Weakness
Affected products
- affected >= 3.32.0, < 3.76.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmmatrix-react-sdkGHSA-c9vx-2g7w-rp65 (opens in a new tab)
References (2)
- https://github.com/matrix-org/matrix-react-sdk/security/advisories/GHSA-c9vx-2g7w-rp65 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/matrix-org/matrix-react-sdk/commit/22fcd34c606f32129ebc967fc21f24fb708a98b8 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-c9vx-2g7w-rp65 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-37259)Record last updated .