CVE-2025-9670

Public Exploit
mixmark-io turndown commonmark-rules.js redos

Description

A security flaw has been discovered in mixmark-io turndown up to 7.2.1. This affects an unknown function of the file src/commonmark-rules.js. Performing manipulation results in inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been released to the public and may be exploited.

Category

5.5
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
CVSS 2.0 •
Third-Party Advisory vuldb.com
Affected: mixmark-io turndown
Published at:
Updated at:

References

Link Tags
https://vuldb.com/?id.321880 vdb entry
https://vuldb.com/?ctiid.321880 signature permissions required
https://vuldb.com/?submit.637911 third party advisory
https://github.com/mixmark-io/turndown/issues/501 issue tracking
https://github.com/mixmark-io/turndown/issues/501#issue-3336342088 exploit issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-9670?
CVE-2025-9670 has been scored as a medium severity vulnerability.
How to fix CVE-2025-9670?
To fix CVE-2025-9670, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-9670 being actively exploited in the wild?
It is possible that CVE-2025-9670 is being exploited or will be exploited in a near future based on public information.
What software or system is affected by CVE-2025-9670?
CVE-2025-9670 affects mixmark-io turndown.
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