Is CVE-2024-52815 actively exploited?

CVE-2024-52815 has no public evidence of in-the-wild exploitation as of 2025-08-26.

What is the CVSS score for CVE-2024-52815?

CVE-2024-52815 has a CVSS score of 8.7 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2024-52815?

Patch guidance is available from matrix security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-52815.

Fix CVE-2024-52815 - HIGH matrix synapse

Description

Synapse is an open-source Matrix homeserver. Synapse versions before 1.120.1 fail to properly validate invites received over federation. This vulnerability allows a malicious server to send a specially crafted invite that disrupts the invited user's /sync functionality. Synapse 1.120.1 rejects such invalid invites received over federation and restores the ability to sync for affected users.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-20 · Improper Input ValidationNVD-CWE-noinfo

Metadata

Primary Vendor: MATRIX
Published: 12/3/2024
Last Modified: 8/26/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

matrix : synapse

Remediation Guidance

Executive Summary

Cite this page

CVE-2024-52815. CVEDatabase.com. Retrieved 3 May 2026. https://cvedatabase.com/cve/CVE-2024-52815

View on NIST NVD

CVE-2024-52815 vulnerability