PT-2025-42391 · Happy-Dom · Happy-Dom

Published 2025-10-15 · Updated 2025-10-16 · CVE-2025-62410

Positive Technologies (AI Summary)

CVSS v4.0

9.4

Critical

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Name of the Vulnerable Software and Affected Versions happy-dom versions prior to 20.0.2

Description The software does not sufficiently isolate untrusted JavaScript, even when using the --disallow-code-generation-from-strings flag. The untrusted script and the main application share the same Isolate/process, allowing attackers to use prototype pollution to hijack references, such as process, or manipulate control flow by altering checks for undefined properties. This is an incomplete fix for a previously identified issue.

Recommendations Update to version 20.0.2 or later.

Exploit

Fix

RCE

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2025-62410

GHSA-QPM2-6CQ5-7PQ5

Affected Products

Happy-Dom

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62410.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-62410 · Security Note
• https://osv.dev/vulnerability/GHSA-qpm2-6cq5-7pq5 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-62410 · Vendor Advisory
• https://github.com/capricorn86/happy-dom · Note
• https://github.com/capricorn86/happy-dom/commit/f4bd4ebe3fe5abd2be2bcea1c07043c8b0b70eea · Note
• https://github.com/capricorn86/happy-dom/security/advisories/GHSA-qpm2-6cq5-7pq5 · Note
• https://twitter.com/CVEnew/status/1978545025048105010 · Twitter Post
• https://reddit.com/r/VulnMatter/comments/1o87w9u/resumen_diario_de_vulnerabilidades_16102025 · Reddit Post
• https://twitter.com/0dayPublishing/status/1978516053438136611 · Twitter Post
• https://t.me/CVEtracker/35035 · Telegram Post
• https://twitter.com/CCBalert/status/1978816244104024189 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1978647947647558060 · Twitter Post