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GHSA-c9vx-2g7w-rp65

matrix-react-sdk vulnerable to XSS in Export Chat feature

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-37259

Packages

EcosystemPackageAffectedFixed in
npm matrix-react-sdk >= 3.32.0, < 3.76.0 3.76.0

Details

As written in the advisory (Markdown source, shown as plain text).

### 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

References

External links from the advisory. They lead to third-party sites.