9.8

CVE-2021-23899: owasp json-sanitizer

CVSS: 9.8v3.1CriticalModified
AliasesGHSA-mm8j-9x84-m9cv
Published 13-01-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-23899 is a critical (CVSS 9.8) vulnerability in owasp json-sanitizer. EPSS estimates a 2.09% chance of exploitation in the next 30 days, higher than 81.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.09%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-01-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.09%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

+0.03 pp

From 2.07% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.09%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Com.mikesamuel1 product
  • json-sanitizer< 1.2.2
Owasp1 product

2 vendors · 2 products

References

4 links