Vulnerability Report

CVE-2021-39202

Title: Stored XSS in WordPress Widgets Editor (Custom HTML)

XSS

Proof Of Concept

No public PoC currently indexed for CVE-2021-39202.

CWE Category CWE-79
Published Date Sep 09, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 7.6 CVSS v3.1
Exploit Probability (EPSS)
0.82%

Vulnerability Summary

CVE-2021-39202: WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions the widgets editor introduced in WordPress 5.8 beta 1 has improper handling of HTML input in the Custom HTML feature. This leads to stored XSS in the custom HTML widget. This has been patched in WordPress 5.8. It was only present during the testing/beta phase of WordPress 5.8.

Impacted Vendors

W
wordpress 1

Reference Links

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-fr6h-3855-j297 https://hackerone.com/reports/1222797 https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-fr6h-3855-j297 https://hackerone.com/reports/1222797
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.4
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v2.0
Source Entity [email protected]
Severity LOW
3.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:S/C:N/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-39202 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Affected Stack

No specific products linked.