Medium severity · published Jun 9, 2020
CVE-2020-13973
OWASP json-sanitizer before 1.2.1 allows XSS
6.1
CVSS
1.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JS
Json-sanitizer · Owasp
before 1.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-13973
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-13973
Exploit
https://github.com/OWASP/json-sanitizer/pull/20
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CVE-2021-23899
OWASP json-sanitizer before 1.2.2 may emit closing SCRIPT tags and CDATA section delimiters for crafted input
7.5
CVE-2021-23900
OWASP json-sanitizer before 1.2.2 can output invalid JSON or throw an undeclared exception for crafted input