CVE-2023-37259
matrix-react-sdk vulnerable to XSS in Export Chat feature
Description
### 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
How to fix CVE-2023-37259
To remediate CVE-2023-37259, upgrade the affected package to a fixed version below.
- —upgrade to 3.76.0 or later
Is CVE-2023-37259 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 3.32.0, < 3.76.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N |