Low severity3.1NVD Advisory· Published Sep 27, 2023· Updated Jun 17, 2026
CVE-2023-42453
CVE-2023-42453
Description
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Users were able to forge read receipts for any event (if they knew the room ID and event ID). Note that the users were not able to view the events, but simply mark it as read. This could be confusing as clients will show the event as read by the user, even if they are not in the room. This issue has been patched in version 1.93.0. Users are advised to upgrade. There are no known workarounds for this issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
matrix-synapsePyPI | >= 0.34.0, < 1.93.0 | 1.93.0 |
Affected products
6cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*range: >=1.34.0,<1.93.0
- (no CPE)range: >= 0.34.0, < 1.93.0
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
- ghsa-coords2 versions
>= 0.34.0, < 1.93.0+ 1 more
- (no CPE)range: >= 0.34.0, < 1.93.0
- (no CPE)range: < 1.93.0-1.1
Patches
Vulnerability mechanics
References
13- github.com/matrix-org/synapse/pull/16327nvdIssue TrackingPatchWEB
- github.com/advisories/GHSA-7565-cq32-vx2xghsaADVISORY
- github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2xnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2023-42453ghsaADVISORY
- github.com/matrix-org/synapse/commit/63d28a88c1d18c64ea7e23b6dd7483e6d5dcf881ghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-180.yamlghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4ghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4/nvdMailing ListRelease Notes
- lists.fedoraproject.org/archives/list/[email protected]/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AOghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO/nvdMailing ListRelease Notes
- lists.fedoraproject.org/archives/list/[email protected]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFYghsaWEB
- security.gentoo.org/glsa/202401-12nvdWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/nvd
News mentions
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