Vulnerability Name:

CVE-2019-16780 (CCN-173613)

Assigned:2019-12-13
Published:2019-12-13
Updated:2022-11-23
Summary: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 v3 Severity:5.4 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
4.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
5.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
4.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:3.5 Low (CVSS v2 Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2019-16780

Source: XF
Type: UNKNOWN
wp-cve201916780-xss(173613)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/WordPress/wordpress-develop/commit/505dd6a20b6fc3d06130018c1caeff764248c29e

Source: CONFIRM
Type: Third Party Advisory
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-x3wp-h3qx-9w94

Source: MISC
Type: Permissions Required, Third Party Advisory
https://hackerone.com/reports/738644

Source: BUGTRAQ
Type: Mailing List, Third Party Advisory
20200108 [SECURITY] [DSA 4599-1] wordpress security update

Source: MISC
Type: Release Notes, Third Party Advisory
https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/

Source: CCN
Type: WordPress Web site
Version 5.3.1 - WordPress.org

Source: CCN
Type: WPScan Vulnerability Database Web site
WordPress <= 5.3 - Stored XSS via Block Editor Content

Source: MISC
Type: Third Party Advisory
https://wpvulndb.com/vulnerabilities/9976

Source: DEBIAN
Type: Third Party Advisory
DSA-4599

Source: DEBIAN
Type: Third Party Advisory
DSA-4677

Vulnerable Configuration:Configuration 1:
  • cpe:/a:wordpress:wordpress:3.7:-:*:*:*:*:*:*
  • OR cpe:/a:wordpress:wordpress:*:*:*:*:*:*:*:* (Version > 3.7 and < 5.3.1)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:bufferapp:digg_digg:5.3.0::~~~wordpress~~:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:2019167800000000
    V
    		CVE-2019-16780 on Ubuntu 19.04 (disco) - medium.
    2019-12-26
    oval:com.ubuntu.bionic:def:2019167800000000
    V
    		CVE-2019-16780 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-12-26
    oval:com.ubuntu.xenial:def:2019167800000000
    V
    		CVE-2019-16780 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-12-26
    BACK
    wordpress wordpress 3.7 -
    wordpress wordpress *
    debian debian linux 9.0
    debian debian linux 10.0
    bufferapp digg digg 5.3.0