Denial of Service Vulnerability in SyncBreeze by SyncBreeze Solutions
CVE-2023-53873

8.7HIGH

Key Information:

Vendor

Syncbreeze

Status
Syncbreeze
Vendor
CVE Published:
15 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-53873?

SyncBreeze 15.2.24 is affected by a vulnerability in its login authentication mechanism that creates a denial of service scenario. Attackers can exploit this by submitting oversized password inputs with repeated parameters, overwhelming the login endpoint and potentially causing service disruptions. This vulnerability poses a risk to service availability and requires attention from users of the affected version.

Affected Version(s)

SyncBreeze 15.2.24

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-53873 - Proof of Concept

References

https://www.exploit-db.com/exploits/51725
exploit
https://www.syncbreeze.com/
product
https://www.vulncheck.com/advisories/syncbreeze-denial-of...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

mohamed youssef
JSON
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CVE-2023-53873 : Denial of Service Vulnerability in SyncBreeze by SyncBreeze Solutions