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Fencer Vulns
medium 6.1

CVE-2024-53985 json

Possible XSS vulnerability with certain configurations of rails-html-sanitizer 1.6.0

published 2024-12-02 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-3517 , GHSA-w8gc-x259-rc7x

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails >= 7.1.0 and Nokogiri < 1.15.7, or 1.16.x < 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both "math" and "style" elements or both both "svg" and "style" elements. This vulnerability is fixed in 1.6.1.

Patch / fix

  • rubygems rails-html-sanitizer 1.6.1
  • rubyonrails html_sanitizer 1.6.1
  • rubyonrails rails_html_sanitizers 1.6.1
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.7.0-1.1

opensuse advisories openSUSE-SU-2026:10569-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-53985 updated cvss 3.1

rails-html-sanitizer: Possible XSS vulnerability with certain configurations of rails-html-sanitizer 1.6.0

  • Red Hat 3scale API Management Platform 2 3scale-amp2/zync-rhel8 Red Hat Satellite 6 rubygem-rails-html-sanitizer
    affected: no fix available “Fix deferred”
  • Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel7 Red Hat Satellite 6 rubygem-rails-html-sanitizer
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
22 mo ago

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CNA 4.0 2.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
rubygems rails-html-sanitizer
>=1.6.0, <1.6.1
1.6.1

Affected products

  • rails rails-html-sanitizer

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.