What is CVE-2018-12291?

CVE-2018-12291 is a high-severity vulnerability in Matrix Synapse. CVSS score: 7.5/10. Published 2018-06-13.

How severe is CVE-2018-12291?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Matrix Synapse

CVE-2018-12291

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.

EPSS: 0.018 (76.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Matrix Synapse
N/a — versions n/a

References

cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-12291?: CVE-2018-12291 is a high-severity vulnerability in Matrix Synapse. CVSS score: 7.5/10. Published 2018-06-13.
How severe is CVE-2018-12291?: High severity. CVSS v3 base score is 7.5 out of 10.