CVE-2025-66622
7.5 · HIGHOverview
CVE-2025-66622 is a high-severity vulnerability affecting matrix matrix-rust-sdk. It was published on December 9, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
matrix-sdk-base is the base component to build a Matrix client library. Versions 0.14.1 and prior are unable to handle responses that include custom m.room.join_rules values due to a serialization bug. This can be exploited to cause a denial-of-service condition, if a user is invited to a room with non-standard join rules, the crate's sync process will stall, preventing further processing for all rooms. This is fixed in version 0.16.0.
Remediation
Check the references section for vendor advisories and patches from matrix. Update matrix-rust-sdk to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| matrix | matrix-rust-sdk | >= 0, < 0.16.0 | Affected |
Frequently Asked Questions
What is CVE-2025-66622?
CVE-2025-66622 is a high-severity vulnerability affecting matrix matrix-rust-sdk. It was published on December 9, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-66622?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2025-66622?
Check the references section for vendor advisories and patches from matrix. Update matrix-rust-sdk to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-66622?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-66622 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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