How severe is CVE-2023-28120?

CVE-2023-28120 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 low, and availability none.

Is CVE-2023-28120 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28120?

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

Does CVE-2023-28120 have an EU (EUVD) identifier?

Yes. CVE-2023-28120 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-1069.

When was CVE-2023-28120 published?

CVE-2023-28120 was published on 2025-01-09 and last updated on 2026-06-17.

CVE-2023-28120

CVE-2023-28120 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-1069
Weakness: CWE-79
Published: 2025-01-09
Last modified: 2026-06-17

Description

There is a vulnerability in ActiveSupport if the new bytesplice method is called on a SafeBuffer with untrusted user input.

Frequently asked questions

What is CVE-2023-28120?: There is a vulnerability in ActiveSupport if the new bytesplice method is called on a SafeBuffer with untrusted user input.
How severe is CVE-2023-28120?: CVE-2023-28120 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 low, and availability none.
Is CVE-2023-28120 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-28120?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-28120 have an EU (EUVD) identifier?: Yes. CVE-2023-28120 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-1069.
When was CVE-2023-28120 published?: CVE-2023-28120 was published on 2025-01-09 and last updated on 2026-06-17.

References

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