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CVE-2018-12423
In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
High7.5EPSS 1.8%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 1.8% · top 21% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- n/a
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPImatrix-synapseGHSA-ch5v-fhg8-7gv9 (opens in a new tab)
References (3)
- https://matrix.org/blog/2018/06/14/security-update-synapse-0-31-2/ (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/matrix-org/matrix-doc/issues/1304 (opens in a new tab)x_refsource_MISCx_transferred
- https://bugs.debian.org/901549 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-ch5v-fhg8-7gv9 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-12423)Record last updated .