What’s Vulnerable › Vulnerabilities

CVE-2024-32463: phlex makes Cross-site Scripting (XSS) possible due to improper sanitisation of `href` attributes on `<a>` tags

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-17 · updated 2026-06-17
• Weakness: CWE-79

Description

phlex is an open source framework for building object-oriented views in Ruby. There is a potential cross-site scripting (XSS) vulnerability that can be exploited via maliciously crafted user data. The filter to detect and prevent the use of the `javascript:` URL scheme in the `href` attribute of an `<a>` tag could be bypassed with tab `\t` or newline `\n` characters between the characters of the protocol, e.g. `java\tscript:`. This vulnerability is fixed in 1.10.1, 1.9.2, 1.8.3, 1.7.2, 1.6.3, 1.5.3, and 1.4.2. Configuring a Content Security Policy that does not allow `unsafe-inline` would effectively prevent this vulnerability from being exploited.

Affected products

• ruby Fileutils: 1.0.0

References

• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
• https://github.com/phlex-ruby/phlex/commit/9e3f5b980655817993682e409cbda72956d865cb
• https://github.com/phlex-ruby/phlex/security/advisories/GHSA-g7xq-xv8c-h98c
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#unsafe-inline
• https://github.com/phlex-ruby/phlex/commit/9e3f5b980655817993682e409cbda72956d865cb
• https://github.com/phlex-ruby/phlex/security/advisories/GHSA-g7xq-xv8c-h98c

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