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.

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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
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