Medium severity · published Sep 9, 2021
CVE-2021-39202
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database
5.4
CVSS
0.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
WordPress · WordPress
5.8; 5.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39202
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-39202
Third Party Advisory
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-fr6h-3855-j297
Permissions Required
https://hackerone.com/reports/1222797
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