Vulnerability Description
In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
CVSS Score
7.5
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Synapse | < 0.31.2 |
References
- https://bugs.debian.org/901549Mailing ListThird Party Advisory
- https://github.com/matrix-org/matrix-doc/issues/1304Third Party Advisory
- https://matrix.org/blog/2018/06/14/security-update-synapse-0-31-2/Vendor Advisory
- https://bugs.debian.org/901549Mailing ListThird Party Advisory
- https://github.com/matrix-org/matrix-doc/issues/1304Third Party Advisory
- https://matrix.org/blog/2018/06/14/security-update-synapse-0-31-2/Vendor Advisory
FAQ
What is CVE-2018-12423?
CVE-2018-12423 is a vulnerability with a CVSS score of 7.5 (HIGH). In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
How severe is CVE-2018-12423?
CVE-2018-12423 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-12423?
Check the references section above for vendor advisories and patch information. Affected products include: Matrix Synapse.