SARA / Free Tools / CVE / CVE-2022-36009

CVE-2022-36009 — gomatrixserverlib is a Go library for matrix protocol federation

gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `"events_default"` key of the `m.room.power_levels` even

CVSS
5.0 MEDIUM
EPSS
0.62% (top 30.10%)
CWE
CWE-863
Published
2022-08-19T20:35:09.000Z
Last modified
2025-04-23T17:48:13.250Z
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

01What is this vulnerability?

gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `"events_default"` key of the `m.room.power_levels` event, defaulting the event default power level to zero in all cases. Power levels are the matrix terminology for user access level…

02Affected products

VendorProductVersions
matrix-orggomatrixserverlib< 0.9.3 for dendrite, < 723fd49 for gomatrixserverlib

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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