CVE-2025-52561Public exploitNetwork attack vector

Cross-site scripting via unescaped style content

Published Jun 23, 2025 · Updated Jun 24, 2025

Cross-site scripting in HTMLSanitizer.jl before 0.2.1 allows remote attackers to execute JavaScript through sanitized HTML. When style is allowlisted inside SVG content, sanitize decodes an encoded closing style tag and emits the following attacker-controlled tag as live HTML. Exploitation requires an application to sanitize untrusted HTML with style allowlisted and render the result in a browser, exposing that browser's application context.

CVSS severity6.9
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in HTMLSanitizer.jl before 0.2.1 allows remote attackers to execute JavaScript through sanitized HTML. When style is allowlisted inside SVG content, sanitize decodes an encoded closing style tag and emits the following attacker-controlled tag as live HTML. Exploitation requires an application to sanitize untrusted HTML with style allowlisted and render the result in a browser, exposing that browser's application context.

The record

CVE
CVE-2025-52561
Published
Jun 23, 2025
Updated
Jun 24, 2025
Vendor
JuliaHub
Product
HTMLSanitizer.jl
Classifications
CWE-80, CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2025Record 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=< 0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JuliaHub · HTMLSanitizer.jlversion=< 0.2.1

Published CVSS scores

6.9GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

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-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

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

Technologies

Your stack

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Your stack

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