mixmark-io turndown up to 7.2.1 src/commonmark-rules.js redos
Summary
A vulnerability was found in mixmark-io turndown up to 7.2.1. It has been declared as problematic. This impacts an unknown function of the file src/commonmark-rules.js. Executing a manipulation can lead to redos. This vulnerability is registered as CVE-2025-9670. It is possible to launch the attack remotely. Furthermore, an exploit is available.
Details
A vulnerability has been found in mixmark-io turndown up to 7.2.1 and classified as problematic. This vulnerability affects some unknown processing of the file src/commonmark-rules.js. The manipulation with an unknown input leads to a redos vulnerability. The CWE definition for the vulnerability is CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. As an impact it is known to affect availability.
The advisory is shared for download at github.com. This vulnerability was named CVE-2025-9670. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1449.003.
It is possible to download the exploit at github.com. It is declared as proof-of-concept.
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.
Product
Vendor
Name
Version
Website
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 5.0
VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 5.3
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: RedosCWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
08/29/2025 Advisory disclosed08/29/2025 VulDB entry created
08/30/2025 VulDB entry last update
Sources
Product: github.comAdvisory: 501
Status: Not defined
CVE: CVE-2025-9670 (🔒)
GCVE (CVE): GCVE-0-2025-9670
GCVE (VulDB): GCVE-100-321880
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 08/29/2025 12:10 PMUpdated: 08/30/2025 08:24 AM
Changes: 08/29/2025 12:10 PM (55), 08/30/2025 08:24 AM (31)
Complete: 🔍
Submitter: CrazzyHe
Cache ID: 244::40
Submit
Accepted
- Submit #637911: turndown npm v7.2.1 Inefficient Regular Expression Complexity (by CrazzyHe)
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