🛡️ CVE-2022-23518 — debian-linux

🟡 CVSS 6.1 — Medium ⚠️ Exploit Public CWE-79 NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Improper neutralization of data URIs may allow XSS in rails-html-sanitizer

Summary

rails-html-sanitizer >= 1.0.3, < 1.4.4 is vulnerable to cross-site scripting via data URIs when used in combination with Loofah >= 2.1.0.

Mitigation

Upgrade to rails-html-sanitizer >= 1.4.4.

Severity

The maintainers have evaluated this as [Medium Severity 6.1](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

References

  • [CWE - CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (4.9)](https://cwe.mitre.org/data/definitions/79.html)
  • [SVG MIME Type (image/svg+xml) is misleading to developers · Issue #266 · w3c/svgwg](https://github.com/w3c/svgwg/issues/266)
  • https://github.com/rails/rails-html-sanitizer/issues/135
  • https://hackerone.com/reports/1694173

Credit

This vulnerability was independently reported by Maciej Piechota (@haqpl) and Mrinmoy Das (@goromlagche).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2022-23518 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2022-23518 is recorded against 4 packages.

  • debian-linux
  • loofah (from 2.1.0 up to 2.19.1)
  • rails-html-sanitizer (from 1.0.3 up to 1.4.4)
  • rails-html-sanitizers (from 1.0.3 up to 1.4.4)

Timeline and source

Published on 14 December 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
github.com
hackerone.com
lists.debian.org
github.com
github.com
hackerone.com
lists.debian.org
lists.debian.org

CVE-2022-23518 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE CWE-79
Public Exploit ⚠️ Yes
Source NVD
Published 2022-12-14
Updated 2026-08-12
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
debian-linux — —
loofah 2.1.0 2.19.1
rails-html-sanitizer 1.0.3 1.4.4
rails-html-sanitizers 1.0.3 1.4.4

References

Exploit, Issue Tracking, Third Party Advisory https://github.com/rails/rails-html-sanitizer/issues/135
Permissions Required, Third Party Advisory https://hackerone.com/reports/1694173
Exploit, Issue Tracking, Third Party Advisory https://github.com/rails/rails-html-sanitizer/issues/135
Permissions Required, Third Party Advisory https://hackerone.com/reports/1694173

Similar Threats

Exploit Protection

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