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CVE-2023-53873

SyncBreeze 15.2.24 Denial of Service via Login Endpoint Overflow

HIGH
8.7
CVSS Score
Published: December 15, 2025 at 08:28 PM UTC
Updated: June 17, 2026 at 06:46 AM UTC
2 products affected across 2 vendorsSyncBreezeSync Breeze

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Severity
HIGH8.7
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

SyncBreeze 15.2.24 contains a denial of service vulnerability in the login authentication mechanism that allows attackers to crash the service. Attackers can send an oversized password parameter with repeated 'password=' values to overwhelm the login endpoint and potentially disrupt service availability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Exploit
Source: cverecord
https://www.exploit-db.com/exploits/51725
Product
Source: cverecord
https://www.syncbreeze.com/
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/syncbreeze-denial-of-service-via-login-endpoint-overflow

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-400

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