CVE-2025-52561

HTMLSanitizer.jl Possible XSS

Description

HTMLSanitizer.jl is a Whitelist-based HTML sanitizer. Prior to version 0.2.1, when adding the style tag to the whitelist, content inside the tag is incorrectly unescaped, and closing tags injected as content are interpreted as real HTML, enabling tag injection and JavaScript execution. This could result in possible cross-site scripting (XSS) in any HTML that is sanitized with this library. This issue has been patched in version 0.2.1. A workaround involves adding the math and svg elements to the whitelist manually.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.09%
Affected: JuliaComputing HTMLSanitizer.jl
Published at:
Updated at:

References

Link Tags
https://github.com/JuliaComputing/HTMLSanitizer.jl/security/advisories/GHSA-3mj7-qxh9-6q4p
https://github.com/JuliaComputing/HTMLSanitizer.jl/pull/5
https://github.com/JuliaComputing/HTMLSanitizer.jl/commit/0c3dc359e4a64c39cac609541945c0518feef040

Frequently Asked Questions

What is the severity of CVE-2025-52561?
CVE-2025-52561 has been scored as a medium severity vulnerability.
How to fix CVE-2025-52561?
To fix CVE-2025-52561, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-52561 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-52561 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-52561?
CVE-2025-52561 affects JuliaComputing HTMLSanitizer.jl.
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