HOMEVULNERABILITIESCVE-2024-52815
MEDIUM

CVE-2024-52815

CWE-20Published: December 3, 2024· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2024-52815 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Vendors & Products

matrix1 product(s)
synapse
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h

All References (1)

→
https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2hVendor Advisory

Quick Facts

CVE IDCVE-2024-52815
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedDec 3, 2024

Related CVEs (CWE-20)

CVE-2026-47928
10.0
CVE-2003-1487
10.0
CVE-2026-48277
10.0
CVE-2026-33587
10.0
CVE-2021-26622
10.0
CVE-2004-0840
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2024-52815 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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