There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby. The gem allows non-whitelisted…

Description

There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby. The gem allows non-whitelisted attributes to be present in sanitized output when input with specially-crafted HTML fragments, and these attributes can lead to an XSS attack on target applications. This issue is similar to CVE-2018-8048 in Loofah. All users running an affected release should either upgrade or use one of the workarounds immediately.

Scores

EPSS (exploitation in 30 days)

1.3% · top 31% of all CVEs (3 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CWE-79) (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• Rails · rails-html-sanitizer

  • affected <= 1.0.3

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• RubyGemsrails-html-sanitizerGHSA-px3r-jm9g-c8w8 (opens in a new tab)

References (1)

• https://github.com/rails/rails-html-sanitizer/commit/f3ba1a839a35f2ba7f941c15e239a1cb379d56ae (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-px3r-jm9g-c8w8 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2018-3741](https://trackcve.app/badge/CVE-2018-3741.svg)](https://trackcve.app/cve/CVE-2018-3741)

Record last updated 5 Aug 2024, 04:50 UTC.