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No exploitation reportedFix available

CVE-2023-28120

No exploitation reported by the sources we read.

  • Published2025-01-09
  • Fixed in7.0.4.3 · 6.1.7.3
  • WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2025-01-0901:15CVE publishedNVD

Versions per branch

OSV
activesupport
BranchAffectedFixed in
7.0≥ 7.0.0, < 7.0.4.37.0.4.3
6.1< 6.1.7.36.1.7.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As hackerone, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Rails ActiveSupportother versions: not affected
    Affected
    • ≥ 7.0.4.3, < 7.0.4.3fixed in 7.0.4.3custom
    • ≥ 6.1.7.3, < 6.1.7.3fixed in 6.1.7.3custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-01-09

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • railsUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • railsUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • railsUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • railsUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • railsUbuntu:26.10all versions · no fixed version listed
  • railsUbuntu:26.04:LTSall versions · no fixed version listed
  • railsUbuntu:25.10all versions · no fixed version listed
  • railsUbuntu:24.04:LTSall versions · no fixed version listed

45 more package ranges on OSV.dev

Vendor advisories

  • RHSA-2023:3495 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Logging Subsystem 5.7.2 - Red Hat OpenShift security update

  • RHSA-2023:1953 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Logging Subsystem 5.6.5 - Red Hat OpenShift security update

Full record on NVD

Fix

  1. Update activesupport to 7.0.4.3 · 6.1.7.3
  2. Vendor fix Red Hat Product Security RHSA-2023:3495 · 4 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Workaround from the vendor Red Hat Product Security RHSA-2023:3495 · 63 productsAvoid calling bytesplice on a SafeBuffer (html_safe) string with untrusted user input.

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Published
2025-01-09
Last Modified
2026-06-17
NVD status
Deferred
GitHub Advisory
GHSA-pj73-v5mw-pm9j

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.

Is CVE-2023-28120 actively exploited?

Active exploitation of CVE-2023-28120 has not been confirmed. Its EPSS score was 0.9% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-28120?

CVE-2023-28120 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

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