CVE-2025-22872Network attack vector

Cross-site scripting via misclassified self-closing tags

Published Apr 16, 2025 · Updated May 16, 2025

Cross-site scripting in golang.org/x/net/html before 0.38.0 allows remote attackers to alter parsed document structure via crafted HTML. The tokenizer treats an unquoted attribute value ending in a solidus as a self-closing tag, causing Parse-family APIs to place following content in the wrong DOM scope. Exploitation requires attacker-controlled HTML; Parse-family effects require foreign content such as SVG or MathML, while direct Tokenizer use can affect any tag.

CVSS severity5.3
Medium
EPSS probability0.53%
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 golang.org/x/net/html before 0.38.0 allows remote attackers to alter parsed document structure via crafted HTML. The tokenizer treats an unquoted attribute value ending in a solidus as a self-closing tag, causing Parse-family APIs to place following content in the wrong DOM scope. Exploitation requires attacker-controlled HTML; Parse-family effects require foreign content such as SVG or MathML, while direct Tokenizer use can affect any tag.

The record

CVE
CVE-2025-22872
Published
Apr 16, 2025
Updated
May 16, 2025
Vendor
golang.org/x/net
Product
golang.org/x/net/html
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <0.38.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

golang.org/x/net · golang.org/x/net/htmlversion=0 <0.38.0

Published CVSS scores

5.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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