CVEvulnerability
CVE-2020-26870
6.1 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2020-10-07
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-79
Description
Cure53 DOMPurify before 2.0.17 allows mutation XSS. This occurs because a serialize-parse roundtrip does not necessarily return the original DOM tree, and a namespace can change from HTML to MathML, as demonstrated by nesting of FORM elements.
Affected configurations
• cure53 dompurify (< 2.0.17)
• debian debian linux 9.0
• microsoft visual studio 2017 15.9
• microsoft visual studio 2019 16.0
• microsoft visual studio 2019 16.4
• microsoft visual studio 2019 16.7
• microsoft visual studio 2019 16.8
• oracle application express (< 21.1.0.00.01)
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d Patch, Third Party Advisory
- https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html Mailing List, Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870 Patch, Vendor Advisory
- https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/ Exploit, Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.html Patch, Third Party Advisory
- https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d Patch, Third Party Advisory
- https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17 Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html Mailing List, Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870 Patch, Vendor Advisory
- https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/ Exploit, Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.html Patch, Third Party Advisory