High severity · published Oct 20, 2025
CVE-2025-56224
A lack of rate limiting in the One-Time Password (OTP) verification endpoint of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce attack
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
A lack of rate limiting in the One-Time Password (OTP) verification endpoint of SigningHub v8.6.8 allows attackers to bypass verification via a bruteforce attack.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
Signinghub · Ascertia
through 8.6.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-56224
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-56224
Third Party Advisory
https://github.com/saykino/CVE-2025-56224
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