Medium severity · published Dec 26, 2019
CVE-2019-16780
WordPress users with lower privileges (like contributors) can inject JavaScript code in the block editor using a specific payload, which is executed within the dashboard
5.4
CVSS
1.7%
EPSS
No
On KEV
Description
WordPress users with lower privileges (like contributors) can inject JavaScript code in the block editor using a specific payload, which is executed within the dashboard. This can lead to XSS if an admin opens the post in the editor. Execution of this attack does require an authenticated user. This has been patched in WordPress 5.3.1, along with all the previous WordPress versions from 3.7 to 5.3 via a minor release. Automatic updates are enabled by default for minor releases and we strongly recommend that you keep them enabled.
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)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
WordPress · WordPress
after 3.7 before 5.3.1; 3.7 · source: NVD
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16780
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-16780
Patch
https://github.com/WordPress/wordpress-develop/commit/505dd6a20b6fc3d06130018c1caeff764248c29e
Third Party Advisory
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-x3wp-h3qx-9w94
Permissions Required
https://hackerone.com/reports/738644
Mailing List
https://seclists.org/bugtraq/2020/Jan/8
Release Notes
https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/
Third Party Advisory
https://wpvulndb.com/vulnerabilities/9976
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