Home/CVE/WordPress users with lower privileges (like contributors) can inject JavaScript code in the block editor using a specifi
CVE

CVE-2019-16780

WordPress users with lower privileges (like contributors) can inject JavaScript code in the block editor using a specifi

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.

MEDIUM · CVSS 5.8 EPSS 0.03606
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

Affected Products & Versions

3
wordpress> 3.7 and < 5.3.1
wordpressall versions
debian linuxall versions
▣

Scoring & Timeline

5.8
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Dec 2019 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/WordPress/wordpress-develop/commit/505dd6a20b6fc3d06130018c1caeff764248c29ePatchThird Party Advisory
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-x3wp-h3qx-9w94Third Party Advisory
https://hackerone.com/reports/738644Permissions RequiredThird Party Advisory
https://seclists.org/bugtraq/2020/Jan/8Mailing ListThird Party Advisory
https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/Release NotesThird Party Advisory
https://wpvulndb.com/vulnerabilities/9976Third Party Advisory
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