CVE-2020-13973: Owasp JSON-Sanitizer

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

OWASP json-sanitizer before 1.2.1 allows XSS. An attacker who controls a substring of the input JSON, and controls another substring adjacent to a SCRIPT element in which the output is embedded as JavaScript, may be able to confuse the HTML parser as to where the SCRIPT element ends, and cause non-script content to be interpreted as JavaScript.

Affected products

• Owasp JSON-Sanitizer: before 1.2.1 (fixed in 1.2.1)

Published 2020-06-09. Last modified 2026-06-17.