VDB-320700 · CVE-2025-54363 · Nessus 260143

Microsoft Knack 0.12.0 knack.introspection redos

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
3.9	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Microsoft Knack 0.12.0. The affected element is an unknown function of the component knack.introspection. The manipulation results in redos. This vulnerability is known as CVE-2025-54363. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Microsoft Knack 0.12.0. Affected is some unknown functionality of the component knack.introspection. The manipulation with an unknown input leads to a redos vulnerability. CWE is classifying the issue as CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. This is going to have an impact on availability. CVE summarizes:

Microsoft Knack 0.12.0 allows Regular expression Denial of Service (ReDoS) in the knack.introspection module (issue 1 of 2).

The advisory is shared for download at vulncheck.com. This vulnerability is traded as CVE-2025-54363 since 07/21/2025. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/01/2025). The MITRE ATT&CK project declares the attack technique as T1449.003.

The vulnerability scanner Nessus provides a plugin with the ID 260143 (Linux Distros Unpatched Vulnerability : CVE-2025-54363), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (260143). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Microsoft

Name

Knack

Version

0.12.0

License

commercial

Website

Vendor: https://www.microsoft.com/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.0
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 260143
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-54363

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/21/2025 CVE reserved
08/20/2025 +30 days Advisory disclosed
08/20/2025 +0 days VulDB entry created
09/01/2025 +12 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: vulncheck.com
Status: Not defined

CVE: CVE-2025-54363 (🔒)
GCVE (CVE): GCVE-0-2025-54363
GCVE (VulDB): GCVE-100-320700

Entryinfo

Created: 08/20/2025 07:45
Updated: 09/01/2025 19:48
Changes: 08/20/2025 07:45 (65), 08/20/2025 12:37 (1), 09/01/2025 19:48 (2)
Complete: 🔍
Cache ID: 216::103