CVE-2025-66021

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-66021
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-66021.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-66021
Aliases
Downstream
Published
2025-11-26T01:53:37.578Z
Modified
2025-11-28T02:35:17.262146Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
OWASP Java HTML Sanitizer is vulnerable to XSS via noscript tag and improper style tag sanitization
Details

OWASP Java HTML Sanitizer is a configureable HTML Sanitizer written in Java, allowing inclusion of HTML authored by third-parties in web applications while protecting against XSS. In version 20240325.1, OWASP java html sanitizer is vulnerable to XSS if HtmlPolicyBuilder allows noscript and style tags with allowTextIn inside the style tag. This could lead to XSS if the payload is crafted in such a way that it does not sanitise the CSS and allows tags which is not mentioned in HTML policy. At time of publication no known patch is available.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66021.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-79"
    ]
}
References

Affected packages

Git / github.com/owasp/java-html-sanitizer

Affected ranges

Type
GIT
Repo
https://github.com/owasp/java-html-sanitizer
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
dd8c6a460a03f58edff211e8dc3633eac8138419
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "= 20240325.1"
        }
    ]
}

Affected versions

owasp-java-html-sanitizer-20151202.*

owasp-java-html-sanitizer-20151202.1

release-20160422.*

release-20160422.1

release-20160526.*

release-20160526.1

release-20160614.*

release-20160614.1

release-20160628.*

release-20160628.1

release-20160827.*

release-20160827.1

release-20160924.*

release-20160924.1

release-20170329.*

release-20170329.1

release-20170411.*

release-20170411.1

release-20170512.*

release-20170512.1

release-20170515.*

release-20170515.1

release-20171016.*

release-20171016.1

release-20180219.*

release-20180219.1

release-20181114.*

release-20181114.1

release-20190325.*

release-20190325.1

release-20190503.*

release-20190503.1

release-20190610.*

release-20190610.1

release-20191001.*

release-20191001.1

release-20200615.*

release-20200615.1

release-20200713.*

release-20200713.1

release-20211018.*

release-20211018.1
release-20211018.2

release-20220608.*

release-20220608.1

release-20240325.*

release-20240325.1