CVE-2018-12291

Description

The on_get_missing_events function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.

7.5

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.21%

Third-Party Advisory github.com Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/matrix-org/synapse/releases/tag/v0.31.1	third party advisory
https://github.com/matrix-org/synapse/pull/3371	third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2018-12291?: CVE-2018-12291 has been scored as a high severity vulnerability.
How to fix CVE-2018-12291?: To fix CVE-2018-12291, 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-2018-12291 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2018-12291 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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