PT-2023-30582 · WordPress · The Newsletter Plugin

István Márton + 1 · Published 2023-09-06 · Updated 2023-09-11 · CVE-2023-4772

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 The Newsletter plugin for WordPress versions up to, and including, 7.8.9

Description The issue is related to Stored Cross-Site Scripting via the 'newsletter form' shortcode due to insufficient input sanitization and output escaping on user-supplied attributes. 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, 7.8.9, update to a version that includes the necessary input sanitization and output escaping fixes to prevent Stored Cross-Site Scripting attacks. As a temporary workaround, consider restricting access to the 'newsletter form' shortcode for users with contributor-level and above permissions until a patch is available.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2023-4772

Affected Products

The Newsletter Plugin

References · 8

• https://osv.dev/vulnerability/CVE-2023-4772 · Vendor Advisory
• https://wordfence.com/threat-intel/vulnerabilities/id/87da5300-1add-44fc-a3e0-e8912f946c84?source=cve · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-4772 · Security Note
• https://plugins.trac.wordpress.org/changeset/2955097/newsletter#file21 · Patch
• https://t.me/cvenotify/57689 · Telegram Post
• https://twitter.com/CVEnew/status/1699608701634789615 · Twitter Post
• https://plugins.trac.wordpress.org/browser/newsletter/tags/7.8.9/subscription/subscription.php#L1653 · Note
• https://t.me/cibsecurity/70044 · Telegram Post