CVE-2024-41677Network attack vector

Script execution via incomplete SSR attribute escaping

Published Aug 6, 2024 · Updated Aug 8, 2024

Mutation XSS in Qwik before 1.6.0 allows remote attackers to execute script in a user's browser through server-rendered content. The render-ssr.ts attribute serializer escapes ampersands and double quotes but leaves angle brackets unescaped, allowing browser parsing to mutate the intended DOM into executable markup. Exploitation requires attacker-controlled content to reach SSR output and a user to load the page; successful attacks run script in the affected origin.

CVSS severity6.3
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Mutation XSS in Qwik before 1.6.0 allows remote attackers to execute script in a user's browser through server-rendered content. The render-ssr.ts attribute serializer escapes ampersands and double quotes but leaves angle brackets unescaped, allowing browser parsing to mutate the intended DOM into executable markup. Exploitation requires attacker-controlled content to reach SSR output and a user to load the page; successful attacks run script in the affected origin.

The record

CVE
CVE-2024-41677
Published
Aug 6, 2024
Updated
Aug 8, 2024
Vendor
QwikDev
Product
Qwik
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 8, 2024Record 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 <1.6.0
  2. Affected version[email protected]/qwik: < 1.7.3
  3. Affected versionversion=qwik: < 1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QwikDev · Qwikversion=0 <1.6.0; [email protected]/qwik: < 1.7.3; version=qwik: < 1.6.0

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

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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