CVE-2018-12423

Description

In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.35%

Vendor Advisory matrix.org

Affected: n/a n/a

References

Link	Tags
https://matrix.org/blog/2018/06/14/security-update-synapse-0-31-2/	vendor advisory
https://github.com/matrix-org/matrix-doc/issues/1304	third party advisory
https://bugs.debian.org/901549	third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2018-12423?: CVE-2018-12423 has been scored as a high severity vulnerability.
How to fix CVE-2018-12423?: To fix CVE-2018-12423, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-12423 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2018-12423 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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