PT-2021-15891 · Betterlinks · Simple 301 Redirects By Betterlinks

Chloe Chamberland · Published 2021-06-14 · Updated 2022-12-09 · CVE-2021-24355

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Simple 301 Redirects by BetterLinks WordPress plugin versions prior to 2.0.4

Description The issue is related to the lack of capability checks and insufficient nonce check on the AJAX actions, specifically "simple301redirects/admin/get wildcard" and "simple301redirects/admin/wildcard". This made it possible for authenticated users to retrieve and update the wildcard value for redirects.

Recommendations For versions prior to 2.0.4, update to version 2.0.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the "simple301redirects/admin/get wildcard" and "simple301redirects/admin/wildcard" API endpoints until a patch is available.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2021-24355

Affected Products

Simple 301 Redirects By Betterlinks

References · 7

• 🔥 https://wordfence.com/blog/2021/05/severe-vulnerabilities-patched-in-simple-301-redirects-by-betterlinks-plugin · Exploit
• 🔥 https://wpscan.com/vulnerability/ce8f9648-30fb-4fb9-894e-879dc0f26f98 · Exploit
• https://osv.dev/vulnerability/CVE-2021-24355 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-24355 · Security Note
• https://t.me/cvenotify/16253 · Telegram Post
• https://t.me/cvenotify/33919 · Telegram Post
• https://t.me/cibsecurity/25437 · Telegram Post