How severe is CVE-2025-9670?

CVE-2025-9670 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-9670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-9670?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-9670 have an EU (EUVD) identifier?

Yes. CVE-2025-9670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28874.

When was CVE-2025-9670 published?

CVE-2025-9670 was published on 2025-08-29 and last updated on 2026-06-17.

CVE-2025-9670

CVE-2025-9670 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
CVSS v4: 5.5
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28874
Weakness: CWE-400
Published: 2025-08-29
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-9670?: 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.
How severe is CVE-2025-9670?: CVE-2025-9670 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-9670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-9670?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-9670 have an EU (EUVD) identifier?: Yes. CVE-2025-9670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28874.
When was CVE-2025-9670 published?: CVE-2025-9670 was published on 2025-08-29 and last updated on 2026-06-17.

References

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