CVE-2024-52595Public exploitNetwork attack vector

Cross-site scripting via stripped CSS comments

Published Nov 19, 2024 · Updated Nov 20, 2024

Cross-site scripting in fedora-python lxml_html_clean before 0.4.0 allows remote attackers to pass executable script through HTML cleaning. Cleaner._has_sneaky_javascript removes CSS comments before checking style content, so browser-interpreted markup hidden inside comments in svg, math, or noscript contexts survives sanitization. The default cleaner must process attacker-controlled HTML that an application later renders in a browser, where the surviving markup executes in the viewer's origin.

CVSS severity7.7
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in fedora-python lxml_html_clean before 0.4.0 allows remote attackers to pass executable script through HTML cleaning. Cleaner._has_sneaky_javascript removes CSS comments before checking style content, so browser-interpreted markup hidden inside comments in svg, math, or noscript contexts survives sanitization. The default cleaner must process attacker-controlled HTML that an application later renders in a browser, where the surviving markup executes in the viewer's origin.

The record

CVE
CVE-2024-52595
Published
Nov 19, 2024
Updated
Nov 20, 2024
Vendor
fedora-python
Product
lxml_html_clean
Classifications
CWE-79, CWE-83, CWE-184, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

fedora-python · lxml_html_cleanversion=< 0.4.0

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-83Improper Neutralization of Script in Attributes in a Web Page
CWE-184Incomplete List of Disallowed Inputs
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo