Ascertia SigningHub up to 8.6.8 Invite Request allocation of resources

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Ascertia SigningHub up to 8.6.8. Affected is an unknown function of the component Invite Request Handler. Executing a manipulation can lead to an unknown weakness. This vulnerability appears as CVE-2025-54320. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Ascertia SigningHub up to 8.6.8. This vulnerability affects an unknown code block of the component Invite Request Handler. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is shared for download at ascertia.com. This vulnerability was named CVE-2025-54320 since 07/20/2025. The exploitation appears to be easy. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/20/2025 CVE reserved
11/18/2025 +121 days Advisory disclosed
11/18/2025 +0 days VulDB entry created
11/20/2025 +2 days VulDB entry last update

Sourcesinfo

Advisory: ascertia.com
Status: Not defined

CVE: CVE-2025-54320 (🔒)
GCVE (CVE): GCVE-0-2025-54320
GCVE (VulDB): GCVE-100-332848

Entryinfo

Created: 11/18/2025 20:21
Updated: 11/20/2025 12:32
Changes: 11/18/2025 20:21 (52), 11/20/2025 12:32 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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