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Vulnerability details: VCID-8zas-gnpp-3qfd
Vulnerability ID VCID-8zas-gnpp-3qfd
Aliases CVE-2023-42453
GHSA-7565-cq32-vx2x
PYSEC-2023-180
Summary 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.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-285 Improper Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 4.3 https://github.com/matrix-org/synapse/pull/16327
cvssv3.1 4.3 https://github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2x
Reference id Reference type URL
https://github.com/matrix-org/synapse
https://github.com/matrix-org/synapse/commit/63d28a88c1d18c64ea7e23b6dd7483e6d5dcf881
https://github.com/matrix-org/synapse/pull/16327
https://github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2x
https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-180.yaml
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2AFB2Y3S2VCPCN5P2XCZTG24MBMZ7DM4
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/65QPC55I4D27HIZP7H2NQ34EOXHPP4AO
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY
https://security.gentoo.org/glsa/202401-12
CVE-2023-42453 https://nvd.nist.gov/vuln/detail/CVE-2023-42453
GHSA-7565-cq32-vx2x https://github.com/advisories/GHSA-7565-cq32-vx2x
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://github.com/matrix-org/synapse/pull/16327
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2x
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-06-02T04:19:37.674800+00:00 Pypa Importer Import https://github.com/pypa/advisory-database/blob/main/vulns/matrix-synapse/PYSEC-2023-180.yaml 38.6.0