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Ultimate Review <= 2.4.3 — Unauthenticated Persistent Page Denial of Service

CVE-2026-101161Published · Updated

Action summary

Affected: ≤2.4.3Update to 2.4.4 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:N Integrity
None
A:L Availability
Low
Weakness
CWE-400 Uncontrolled Resource Consumption
Required access
No account needed
Exploit prediction (EPSS)
0.4% chance in 30 days35th percentile
CISA KEV
Not listed
On this page8

Am I affected?

WP Ultimate Review wp-ultimate-review

  1. Affected≤ 2.4.3
  2. Patched in2.4.4

Update to 2.4.4 or newer.

You are affected if you run ≤ 2.4.3. Version 2.4.4 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP Ultimate Review.
  • 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 2.4.4, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch WP Ultimate Review to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Alban Roche.

The Ultimate Review plugin for WordPress is vulnerable to Denial of Service in all versions up to, and including, 2.4.3. This is due to missing isset() guard on the review_location key of the display settings option, which is an empty string when never saved, causing a fatal PHP error when accessed as an array in the shortcode and content-filter handlers. This makes it possible for unauthenticated attackers to cause a persistent denial of service on any reviewed page by submitting a review when the plugin's display settings have never been saved, triggering a fatal PHP error on every subsequent visit to that page. The WP Ultimate Review display settings must have never been saved (fresh install with no settings configuration), leaving the xs_review_display option unset.

Exploits & references

Proof-of-concept & detection

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

Advisories & patches

More in WP Ultimate Review

All 17
More vulnerabilities in WP Ultimate Review
SeverityVulnerabilityCVEPublished
Medium6.5Unauthenticated Arbitrary Shortcode Execution
≤2.4.4Update to 2.4.5
CVE-2026-103234
Medium6.5Unauthenticated Arbitrary Shortcode Execution via 'xs_reviw_summery' Parameter (Split-Shortcode / Late-Registered Shortcode)
≤2.4.3Update to 2.4.4
CVE-2026-100157
Medium5.4Authenticated (Subscriber+) Arbitrary Shortcode Execution via 'xs_reviw_summery' Parameter
≤2.4.3Update to 2.4.4
CVE-2026-103519
High7.2Unauthenticated Stored Cross-Site Scripting
≤2.4.3Update to 2.4.4
CVE-2026-101159
Medium5.3Unauthenticated Persistent Denial of Service
≤2.4.3Update to 2.4.4
CVE-2026-101160

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  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.
EPSS
Exploit Prediction Scoring System by FIRST.org.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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