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.

CVSS v3.0 6.1 MEDIUM
CVSS v2.0 4.3 MEDIUM

6.1^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

4.3^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/	Exploit 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://www.oracle.com//security-alerts/cpujul2021.html	Patch Third Party Advisory

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:a:microsoft:visual_studio_2017:15.9:::::::*
	cpe:2.3:a:microsoft:visual_studio_2019:16.0:::::::*
	cpe:2.3:a:microsoft:visual_studio_2019:16.4:::::::*
	cpe:2.3:a:microsoft:visual_studio_2019:16.7:::::::*
	cpe:2.3:a:microsoft:visual_studio_2019:16.8:::::::*

Configuration 4 (hide)

cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:*

Information

Published : 2020-10-07 09:15

Updated : 2022-04-27 11:49

NVD link : CVE-2020-26870

Mitre link : CVE-2020-26870

JSON object : View

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Advertisement

Products Affected

debian

debian_linux

oracle

application_express

microsoft

visual_studio_2019
visual_studio_2017

cure53

dompurify

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/", "name": "https://research.securitum.com/mutation-xss-via-mathml-mutation-dompurify-2-0-17-bypass/", "tags": ["Exploit", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d", "name": "https://github.com/cure53/DOMPurify/commit/02724b8eb048dd219d6725b05c3000936f11d62d", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17", "name": "https://github.com/cure53/DOMPurify/compare/2.0.16...2.0.17", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://lists.debian.org/debian-lts-announce/2020/10/msg00029.html", "name": "[debian-lts-announce] 20201029 [SECURITY] [DLA 2419-1] dompurify.js security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-26870", "name": "Visual Studio Remote Code Execution Vulnerability", "tags": ["Patch", "Vendor Advisory"], "refsource": "MS"}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html", "name": "N/A", "tags": ["Patch", "Third Party Advisory"], "refsource": "N/A"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-79"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-26870", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}, "baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}}, "publishedDate": "2020-10-07T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.0.17"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:microsoft:visual_studio_2017:15.9:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:visual_studio_2019:16.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:visual_studio_2019:16.4:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:visual_studio_2019:16.7:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:microsoft:visual_studio_2019:16.8:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "21.1.0.00.01"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-04-27T18:49Z"}