High severity · published Dec 15, 2025
CVE-2023-53873
SyncBreeze 15.2.24 Denial of Service via Login Endpoint Overflow
8.7
CVSS
0.5%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SY
SyncBreeze · Syncbreeze
15.2.24 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-53873
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-53873
www.exploit-db.com
https://www.exploit-db.com/exploits/51725
www.syncbreeze.com
https://www.syncbreeze.com/
www.vulncheck.com
https://www.vulncheck.com/advisories/syncbreeze-denial-of-service-via-login-endpoint-overflow