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Simple 301 Redirects 2.0.0 — 2.0.3 - Unauthenticated Redirect Import

CVE-2021-24353Published · Updated

Action summary

Affected: 2.0.0 – 2.0.3Update to 2.0.4 or newer

All remediation steps
Watch plugin
Severity
High8.8
CVSS
8.8
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:R User interaction
Required
S:C Scope
Changed
C:L Confidentiality
Low
I:L Integrity
Low
A:H Availability
High
Weakness
CWE-284 Improper Access Control
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Simple 301 Redirects by BetterLinks – Easy Redirect Manager simple-301-redirects

  1. Affected2.0.0 – 2.0.3
  2. Patched in2.0.4

Update to 2.0.4 or newer.

You are affected if you run 2.0.0 – 2.0.3. Version 2.0.4 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Simple 301 Redirects by BetterLinks – Easy Redirect Manager.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 2.0.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Simple 301 Redirects by BetterLinks – Easy Redirect Manager to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Chloe Chamberland.

The import_data function of the Simple 301 Redirects by BetterLinks WordPress plugin before 2.0.4 had no capability or nonce checks making it possible for unauthenticated users to import a set of site redirects.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Simple 301 Redirects by BetterLinks – Easy Redirect Manager

All 7
More vulnerabilities in Simple 301 Redirects by BetterLinks – Easy Redirect Manager
SeverityVulnerabilityCVEPublished
Medium4.3Missing Authorization via clicked
≤2.0.7Update to 2.0.8
CVE-2023-47761
Medium5.4Cross-Site Request Forgery via 'clicked'
<2.0.8Update to 2.0.8
—
Medium4.32.0.3 - Authenticated Wildcard Activation and Retrieval
2.0.0 – 2.0.3Update to 2.0.4
CVE-2021-24355
High8.82.0.3 - Authenticated Arbitrary Plugin Activation
2.0.0 – 2.0.3Update to 2.0.4
CVE-2021-24356
High8.82.0.3 - Authenticated Arbitrary Plugin Installation
2.0.0 – 2.0.3Update to 2.0.4
CVE-2021-24354

Timeline

  1. CVE published

    Severity high, CVSS 8.8

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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