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CVE-2022-23518

Improper neutralization of data URIs allows XSS in rails-html-sanitizer

MEDIUM
6.1
CVSS Score
Published: December 14, 2022 at 04:22 PM UTC
Updated: June 17, 2026 at 04:30 AM UTC
4 products affected across 4 vendorsDebian LinuxRails Html SanitizersLoofah

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.9%

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Versions >= 1.0.3, < 1.4.4 are vulnerable to cross-site scripting via data URIs when used in combination with Loofah >= 2.1.0. This issue is patched in version 1.4.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Loofah· Loofah Projectrubygems
95%
2.1.0 ≤ v < 2.19.1
Affected range stops below 2.19.1, so it looks safe — our inference, not a vendor statement
Rails Html Sanitizers· Rubyonrailsrubygems
95%
1.0.3 ≤ v < 1.4.4
Affected range stops below 1.4.4, so it looks safe — our inference, not a vendor statement
Rails Html Sanitizers· Rails
60%
v < 1.4.4
Affected range stops below 1.4.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/rails/rails-html-sanitizer/issues/135
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-mcvf-2q2m-x72m
x_refsource_MISCPermissions RequiredThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1694173
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/09/msg00012.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2024/09/msg00045.html

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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