CVE-2021-39201 : WordPress is a free and open-source content management system written in PHP and

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)

Published 2021-09-09 22:15:09

Updated 2021-12-14 21:20:34

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2021-39201

Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 11.0
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Matching versions
Wordpress » Wordpress
Versions from including (>=) 5.0 and before (<) 5.8
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2021-39201

Top countries where our scanners detected CVE-2021-39201

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-39201 53

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-39201!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-39201

EPSS FAQ

0.11%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 43 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-39201

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.5	LOW	AV:N/AC:M/Au:S/C:N/I:P/A:N	6.8	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.4	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	2.3	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
7.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N	2.3	4.7	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: Required Scope: Changed Confidentiality: High Integrity: Low Availability: None

CWE ids for CVE-2021-39201

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2021-39201

https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v

Authenticated cross-site scripting (XSS) in WordPress editor · Advisory · WordPress/wordpress-develop · GitHub
Third Party Advisory
https://www.debian.org/security/2021/dsa-4985

Debian -- Security Information -- DSA-4985-1 wordpress
Third Party Advisory

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https://hackerone.com/reports/1142140

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