Vulnerability Monitor

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CVE-2020-26870

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.

Published

2020-10-07T16:15:18.030

Last Modified

2024-11-21T05:20:23.420

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.1 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	cure53	dompurify	< 2.0.17	Yes
Operating System	debian	debian_linux	9.0	Yes
Application	microsoft	visual_studio_2017	15.9	Yes
Application	microsoft	visual_studio_2019	16.0	Yes
Application	microsoft	visual_studio_2019	16.4	Yes
Application	microsoft	visual_studio_2019	16.7	Yes
Application	microsoft	visual_studio_2019	16.8	Yes
Application	oracle	application_express	< 21.1.0.00.01	Yes

References

https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d Patch, Third Party Advisory ([email protected])
https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17 Patch, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html Mailing List, Third Party Advisory ([email protected])
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870 Patch, Vendor Advisory ([email protected])
https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/ Exploit, Third Party Advisory ([email protected])
https://www.oracle.com//security-alerts/cpujul2021.html Patch, Third Party Advisory ([email protected])
https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com//security-alerts/cpujul2021.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)