Vulnerability Report

CVE-2021-39201

Title: Stored XSS in WordPress Editor (Authenticated)

XSS

Proof Of Concept

No public PoC currently indexed for CVE-2021-39201.

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)
0.49%

Vulnerability Summary

CVE-2021-39201: WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. ### Impact The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post `unfiltered_html`. ### Patches This has been patched in WordPress 5.8, and will be pushed to older versions via minor releases (automatic updates). It's strongly recommended that you keep auto-updates enabled to receive the fix. ### References https://wordpress.org/news/category/releases/ https://hackerone.com/reports/1142140 ### For more information If you have any questions or comments about this advisory: * Open an issue in [HackerOne](https://hackerone.com/wordpress)

Impacted Vendors

W
wordpress 1

Reference Links

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v https://hackerone.com/reports/1142140 https://www.debian.org/security/2021/dsa-4985 https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v https://hackerone.com/reports/1142140 https://www.debian.org/security/2021/dsa-4985
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-2021-39201 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.