CVE-2024-52815— Synapse allows a a malformed invite to break the invitee's `/sync`
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I. Basic Information for CVE-2024-52815
Vulnerability Information
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Vulnerability Title
Synapse allows a a malformed invite to break the invitee's `/sync`
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Element Synapse 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Element Synapse是Element开源的一个开源 Matrix 家庭服务器实现。 Element Synapse存在安全漏洞，该漏洞源于无法正确验证通过联合收到的邀请。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| element-hq | synapse | < 1.120.1 | - |
II. Public POCs for CVE-2024-52815
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · element-hq · 2024-12-03 · 6 CVEs total
| CVE-2024-37302 | 7.5 HIGH | Synapse denial of service through media disk space consumption |
| CVE-2024-37303 | 5.3 MEDIUM | Synapse unauthenticated writes to the media repository allow planting of problematic conte |
| CVE-2024-53867 | 4.3 MEDIUM | Synapse Matrix has a partial room state leak via Sliding Sync |
| CVE-2024-53863 | Synapse can be forced to thumbnail unexpected file formats, invoking external, potentially | |
| CVE-2024-52805 | Synapse allows unsupported content types to lead to memory exhaustion |
IV. Related Vulnerabilities
Same product: synapse
- CVE-2025-61672
Synapse: Invalid device keys degrade federation functionalit - CVE-2025-30355
Synapse vulnerable to federation denial of service via malfo - CVE-2024-37303
Synapse unauthenticated writes to the media repository allow - CVE-2024-37302
Synapse denial of service through media disk space consumpti - CVE-2024-52805
Synapse allows unsupported content types to lead to memory e
Same vendor: element-hq
- CVE-2026-24044
ESS Community Helm Chart has a weak server key generation me - CVE-2025-62425
Matrix Authentication Service account password can be change - CVE-2025-61672
Synapse: Invalid device keys degrade federation functionalit - CVE-2025-59161
In Element Web and Element Desktop, a malicious room can hid - CVE-2025-27599
Element X Android vulnerable to loading malicious web pages
Same weakness: CWE-20
V. Comments for CVE-2024-52815
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