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Vulnerabilities

Vulnerability · CVE-2025-61927

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface.

Published Oct 10, 2025 · catalog updated Oct 10, 2025 · Happy DOM is a

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-61927. EPSS is 0.64%. Act only if a listed version of Happy DOM is a is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Happy DOM is a).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.64%
Remediation
Version ranges on file
Affected products
vendor capricorn86 happy-dom < 20.0.0

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Happy DOM v19 and lower contains a security vulnerability that puts the owner system at the risk of RCE (Remote Code Execution) attacks. A Node.js VM Context is not an isolated environment, and if the user runs untrusted JavaScript code within the Happy DOM VM Context, it may escape the VM and get access to process level functionality. It seems like what the attacker can get control over depends on if the process is using ESM or CommonJS. With CommonJS the attacker can get hold of the function to im

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor capricorn86 happy-dom < 20.0.0< 20.0.0

How to fix CVE-2025-61927

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-61927. EPSS is 0.64%. Act only if a listed version of Happy DOM is a is installed.

Which versions are affected?

Compare what you have installed with capricorn86 happy-dom < 20.0.0 < 20.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.64%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 10, 2025 · EUVD

    Detected

    Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Happy DOM v19 and lower contains a security vulnerability that puts the owner system at the risk of RCE (Remote Code Execution) attacks. A Node.js VM Context is not an isolated environment, and if the user runs untrusted JavaScript code within the Happy DOM VM Context, it may escape the VM and get acces

  2. Oct 10, 2025 · EUVD

    Updated

    Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Happy DOM v19 and lower contains a security vulnerability that puts the owner system at the risk of RCE (Remote Code Execution) attacks. A Node.js VM Context is not an isolated environment, and if the user runs untrusted JavaScript code within the Happy DOM VM Context, it may escape the VM and get acces

Sources

  • CVE.orgVulnerability recordCVE-2025-61927

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-61927

    30-day exploitation probability 0.64%

    first.org
  • EUVDVulnerability recordEUVD-2025-33777

    Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Happy DOM v19 and lower contains a security vulnerability that puts the owner system at the risk of RCE (Remote Code Execution) attacks. A Node.js VM Context is not an isolated environ

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • CVE.orgOct 23, 2026
  • EUVDOct 23, 2026