CVE-2026-34231Public exploitNetwork attack vector

Cross-site scripting via unescaped attribute interpolation

Published Mar 31, 2026 · Updated Mar 31, 2026

Cross-site scripting in the attrs tag in mixxorz slippers before 0.6.3 allows remote attackers to inject JavaScript into rendered pages. The attr_string function in AttrsNode.render inserts untrusted context values into quoted HTML attributes with an f-string and no escaping. Exploitation requires an application to pass attacker-controlled data to the tag and a user to load the rendered page, exposing browser-session data and actions.

CVSS severity6.1
Medium
EPSS probability0.23%
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 the attrs tag in mixxorz slippers before 0.6.3 allows remote attackers to inject JavaScript into rendered pages. The attr_string function in AttrsNode.render inserts untrusted context values into quoted HTML attributes with an f-string and no escaping. Exploitation requires an application to pass attacker-controlled data to the tag and a user to load the rendered page, exposing browser-session data and actions.

The record

CVE
CVE-2026-34231
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
mixxorz
Product
slippers
Classifications
CWE-79, CWE-80, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record 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=< 0.6.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

mixxorz · slippersversion=< 0.6.3

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
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

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Your stack

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