How severe is CVE-2025-13120?

CVE-2025-13120 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-13120 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-13120?

CVE-2025-13120 affects Mruby. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-13120?

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

Does CVE-2025-13120 have an EU (EUVD) identifier?

Yes. CVE-2025-13120 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-175315.

When was CVE-2025-13120 published?

CVE-2025-13120 was published on 2025-11-13 and last updated on 2026-06-17.

CVE-2025-13120

CVE-2025-13120 is a medium-severity vulnerability in Mruby 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-175315
Weakness: CWE-119
Affected product: Mruby
Published: 2025-11-13
Last modified: 2026-06-17

Description

A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file src/array.c. Such manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is eb398971bfb43c38db3e04528b68ac9a7ce509bc. It is advisable to implement a patch to correct this issue.

Frequently asked questions

What is CVE-2025-13120?: A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file src/array.c. Such manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is eb398971bfb43c38db3e04528b68ac9a7ce509bc. It is advisable to implement a patch to correct this issue.
How severe is CVE-2025-13120?: CVE-2025-13120 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-13120 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-13120?: CVE-2025-13120 affects Mruby. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-13120?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-13120 have an EU (EUVD) identifier?: Yes. CVE-2025-13120 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-175315.
When was CVE-2025-13120 published?: CVE-2025-13120 was published on 2025-11-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mruby:mruby:*:*:*:*:*:ruby:*:*

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