5.3

CVE-2023-28120: rails activesupport Cross-site Scripting

CVSS: 5.3v3.1MediumDeferred
AliasesUBUNTU-CVE-2023-28120DEBIAN-CVE-2023-28120openSUSE-SU-2024:12804-1
Published 09-01-2025Last modified 09-01-2025
Open JSON

Vulnerability summary

CVE-2023-28120 is a medium (CVSS 5.3) Cross-site Scripting vulnerability in rails activesupport. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.5% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.95%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 8
DSA-5389-1OPENSUSE-SU-2024:12886-1OPENSUSE-SU-2024:14071-1OPENSUSE-SU-2025:15114-1SUSE-SU-2023:2280-1SUSE-SU-2023:2294-1

Timeline

  1. 09-01-2025
    PublishedVulnerability first disclosed.
  2. 09-01-2025
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.95%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

+0.03 pp

From 0.92% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.95%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • rails< 2:6.1.7.3+dfsg-1
Opensuse1 product
  • rubygem-activesupport-7.0&distro=openSUSE Tumbleweed< 7.0.4.3-1.1
Rails1 product
RubyGems1 product
  • activesupport≥ 7.0.0, < 7.0.4.3 | < 6.1.7.3
Ubuntu1 product
  • railsAll versions (No fix recorded)

5 vendors · 5 products

References

15 links
Show all 15 references