TI-2025-34144 Aliases CVE-2025-54320 GHSA-6w7j-h94f-mm6r

In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the invite user…

LOW 20CWE-770Published 2025-11-18 · Updated 2025-11-19

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-770.

Summary

In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the invite user function, leading to an email bombing vulnerability. An authenticated attacker can exploit this by automating invite requests.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00352 29th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ascertia:signinghub::::::::	up to 8.6.8	Vulnerable	Ascertia

cpe:2.3:a:ascertia:signinghub:*:*:*:*:*:*:*:* Versions up to 8.6.8 Vulnerable ·Ascertia

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-54320
2026-10-03 Alias added: GHSA-6w7j-h94f-mm6r

References

Advisory 2

TI-2025-37948 An open redirect in Ascertia SigningHub User v10.0 allows attackers to redirect users to… CVSS 3.1MEDIUM 6.1
TI-2025-35276 A lack of rate limiting in the login mechanism of SigningHub v8.6.8 allows attackers to… CVSS 3.1CRITICAL 9.8
TI-2025-35274 An arbitrary file upload vulnerability in SigningHub v8.6.8 allows attackers to execute… CVSS 3.1CRITICAL 9.8
TI-2025-34145 In Ascertia SigningHub through 8.6.8, there is a lack of rate limiting on the reset… CVSS 3.1CRITICAL 9.8
TI-2025-35277 A lack of rate limiting in the component /Home/UploadStreamDocument of SigningHub v8.6.8… CVSS 3.1HIGH 7.5
TI-2025-35278 A lack of rate limiting in the One-Time Password (OTP) verification endpoint of… CVSS 3.1HIGH 8.1

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences