CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE-2024-53867
Medium (4.3). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in matrix-synapse 1.120.1.
Synapse is an open-source Matrix homeserver. The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room. Non-state events, like messages, are unaffected. This vulnerability is fixed in 1.120.1.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-31)
- CWE
- CWE-497
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-56w4-5538-8v8h | PyPI | matrix-synapse | >=1.113.0rc1 <1.120.1 | 1.120.1 |
| PYSEC-2026-1610 | PyPI | matrix-synapse | >=1.113.0rc1 <1.120.1 | 1.120.1 |