CVE-2020-26870
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 Medium
AI Score
Confidence
High
0.009 Low
EPSS
Percentile
82.3%
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
| CPE | Name | Operator | Version |
|---|---|---|---|
| cure53:dompurify | cure53 dompurify | lt | 2.0.17 |
References
github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d
github.com/cure53/DOMPurify/compare/2.0.16...2.0.17
lists.debian.org/debian-lts-announce/2020/10/msg00029.html
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870
research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/
www.oracle.com//security-alerts/cpujul2021.html
Social References
More
Related
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
6.1 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 Medium
AI Score
Confidence
High
0.009 Low
EPSS
Percentile
82.3%