vulnwire
7.5high

CVE-2018-12423

Matrix Synapse Authorization Error

Also known as GHSA-ch5v-fhg8-7gv9, PYSEC-2026-844

Published 8 y ago · modified 4 mo ago · JSON

CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.8%
percentile 79%
Public exploits
0
none known

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

Exploit prediction (EPSS)

1.81% probability of exploitation in the next 30 days, higher than 79% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
OSV3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

EcosystemPackageAffectedFixed in
pypimatrix-synapse
<0.31.2
0.31.2

References

  • matrix.org /blog/2018/06/14/security-update-synapse-0-31-2/ · x_refsource_MISC, x_transferred
  • github.com /matrix-org/matrix-doc/issues/1304 · x_refsource_MISC, x_transferred
  • bugs.debian.org /901549 · x_refsource_MISC, x_transferred
  • nvd.nist.gov /vuln/detail/CVE-2018-12423 · advisory
  • github.com /matrix-org/synapse · package
  • matrix.org /blog/2018/06/14/security-update-synapse-0-31-2 · web
  • pypi.org /project/matrix-synapse · package
  • github.com /advisories/GHSA-ch5v-fhg8-7gv9 · advisory

Sources

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