PT-2023-30610 · WordPress · User Submitted Posts

Ancorn + 1 · Published 2023-09-05 · Updated 2023-09-11 · CVE-2023-4779

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions User Submitted Posts plugin for WordPress versions up to, and including, 20230811

Description The issue is related to Stored Cross-Site Scripting via the plugin's usp gallery shortcode due to insufficient input sanitization and output escaping on user-supplied attributes like before. This allows authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Recommendations For versions up to, and including, 20230811, consider disabling the usp gallery shortcode until a patch is available to prevent exploitation. Restrict access to the before attribute in the usp gallery shortcode to minimize the risk of arbitrary web script injection. Avoid using the before attribute in the affected shortcode until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-4779

Affected Products

User Submitted Posts

References · 8

• https://osv.dev/vulnerability/CVE-2023-4779 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-4779 · Security Note
• https://twitter.com/VulmonFeeds/status/1699373939330273355 · Twitter Post
• https://twitter.com/CVEnew/status/1699314946746859708 · Twitter Post
• https://t.me/cvenotify/57976 · Telegram Post
• https://plugins.trac.wordpress.org/changeset/2961841 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/d21ca709-183f-4dd1-849c-f1b2a4f7ec43?source=cve · Note
• https://t.me/cibsecurity/69971 · Telegram Post