Security readout for executives and security teams
Plain-English summary
CVE-2025-56224 describes missing rate limiting on the OTP verification endpoint in SigningHub v8.6.8. If exposed, attackers may repeatedly guess one-time codes and bypass verification. The public metadata marks this high severity, but affected-product metadata is incomplete and no active exploitation is confirmed in the provided sources.
Executive priority
High priority for organizations running SigningHub v8.6.8, especially where OTP verification protects sensitive document-signing workflows. Confirm exposure quickly, then follow vendor guidance or apply compensating controls until a fixed version is verified.
Technical view
The issue is categorized as CWE-307: improper restriction of excessive authentication attempts. The CVSS 3.1 score is 8.1 with network attack vector, no privileges, no user interaction, and high confidentiality, integrity, and availability impact. The source bundle only names SigningHub v8.6.8 in the description; structured affected fields are marked n/a.
Likely exposure
Organizations using SigningHub v8.6.8 with internet-accessible or broadly reachable OTP verification workflows should treat this as potentially material. Exposure cannot be confirmed from CPE data because the provided affected-product metadata is incomplete.
Exploitation context
The CVE description states bypass via brute force against OTP verification. The provided data does not show CISA KEV listing, confirmed in-the-wild exploitation, or vendor remediation details. A public GitHub reference exists, but its contents are not summarized in the bundle.
Researcher notes
Evidence is limited to CVE metadata and one GitHub reference. The affected table lacks vendor, product, version, and CPE detail, so validation should focus on local asset inventory and endpoint behavior without assuming broader product impact.
Mitigation direction
- Check SigningHub vendor guidance for affected versions and fixed releases.
- Prioritize upgrade or vendor-approved mitigation if SigningHub v8.6.8 is deployed.
- Enforce OTP rate limiting or lockout through supported application controls.
- Use gateway or WAF throttling only as a compensating control.
- Monitor OTP verification failures and unusual repeated attempts.
Validation and detection
- Inventory SigningHub deployments and confirm exact version numbers.
- Identify whether OTP verification endpoints are externally reachable.
- Review authentication logs for repeated OTP failures per user, IP, or session.
- Confirm whether rate limiting, lockout, or throttling is active.
- Track vendor advisories for patch or configuration guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-307: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-56224 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/saykino/CVE-2025-56224CVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Excessive Authentication Attempts
Improper Restriction of Excessive Authentication Attempts represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.