Arbitrary code injection in json-sanitizer

CRITICAL 9.8CVE-2021-23899 · GHSA-mm8j-9x84-m9cv · Published 13/01/2021 · updated 17/06/2026

In short

CVE-2021-23899 is a CRITICAL (CVSS 9.8) vulnerability affecting com.mikesamuel:json-sanitizer, json-sanitizer (owasp).
Chance of exploitation in the next 30 days (EPSS): 2.1%, higher than 81.6% of all vulnerabilities.
Fix: update to 1.2.2 or later.

Package	Affected versions	Patched versions
com.mikesamuel:json-sanitizer Maven	`< 1.2.2`	`1.2.2`
json-sanitizer owasp	`< 1.2.2`	`1.2.2`

Description

OWASP json-sanitizer before 1.2.2 may emit closing SCRIPT tags and CDATA section delimiters for crafted input. This allows an attacker to inject arbitrary HTML or XML into embedding documents.

NVD description

OWASP json-sanitizer before 1.2.2 may emit closing SCRIPT tags and CDATA section delimiters for crafted input. This allows an attacker to inject arbitrary HTML or XML into embedding documents.

References

nvd.nist.gov/vuln/detail/CVE-2021-23899 · ADVISORY
OWASP/json-sanitizer commit a37f594 · WEB
OWASP/json-sanitizer · WEB
groups.google.com/g/json-sanitizer-support/c/dAW1AeNMoA0 · WEB

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Package

Affected versions

Patched versions

com.mikesamuel:json-sanitizer

Maven

< 1.2.2

1.2.2

json-sanitizer

owasp

< 1.2.2

1.2.2

Description

OWASP json-sanitizer before 1.2.2 may emit closing SCRIPT tags and CDATA section delimiters for crafted input. This allows an attacker to inject arbitrary HTML or XML into embedding documents.

NVD description

OWASP json-sanitizer before 1.2.2 may emit closing SCRIPT tags and CDATA section delimiters for crafted input. This allows an attacker to inject arbitrary HTML or XML into embedding documents.

More vulnerabilities in com.mikesamuel:json-sanitizer

See all →