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Vulnerabilities

Vulnerability · CVE-2025-59364

The express-xss-sanitizer (aka Express XSS Sanitizer) package through 2.0.0 for Node.js has an unbounded recursion depth in sanitize in lib/sanitize.js for a JSON request body.

Published Sep 14, 2025 · catalog updated Sep 15, 2025 · Express XSS Sanitizer project Express XSS Sanitizer

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-59364. EPSS is 0.45%. Act only if a listed version of Express XSS Sanitizer project Express XSS Sanitizer is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Vendor / distro source
Affected products
vendor Express XSS Sanitizer project Express XSS Sanitizer 2.0.0

The express-xss-sanitizer (aka Express XSS Sanitizer) package through 2.0.0 for Node.js has an unbounded recursion depth in sanitize in lib/sanitize.js for a JSON request body.

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 Express XSS Sanitizer project Express XSS Sanitizer 2.0.02.0.0

How to fix CVE-2025-59364

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-2025-59364. EPSS is 0.45%. Act only if a listed version of Express XSS Sanitizer project Express XSS Sanitizer is installed.

Which versions are affected?

Compare what you have installed with Express XSS Sanitizer project Express XSS Sanitizer 2.0.0 2.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.45%. 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. Sep 14, 2025 · EUVD

    Detected

    The express-xss-sanitizer (aka Express XSS Sanitizer) package through 2.0.0 for Node.js has an unbounded recursion depth in sanitize in lib/sanitize.js for a JSON request body.

  2. Sep 15, 2025 · EUVD

    Updated

    The express-xss-sanitizer (aka Express XSS Sanitizer) package through 2.0.0 for Node.js has an unbounded recursion depth in sanitize in lib/sanitize.js for a JSON request body.

Sources

  • CVE.orgVulnerability recordCVE-2025-59364

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-59364

    30-day exploitation probability 0.45%

    first.org
  • EUVDVulnerability recordEUVD-2025-29138

    The express-xss-sanitizer (aka Express XSS Sanitizer) package through 2.0.0 for Node.js has an unbounded recursion depth in sanitize in lib/sanitize.js for a JSON request body.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 22, 2026
  • EUVDOct 22, 2026