CVE-2023-53873 - CVE House
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Status published High CVE-2023-53873

SyncBreeze 15.2.24 Denial of Service via Login Endpoint Overflow

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • mohamed youssef

References

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CVE-2021-47807
Sync Breeze 13.6.18 - 'Multiple' Unquoted Service Path
High 8.5

Affected Vendor

Affected Software

SyncBreeze
Vulnerable Versions:
15.2.24

Timeline

Official Publish: December 15th, 2025
Last Modified: April 7th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-400

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1498 Network Denial of Service
Impact