CVE-2026-110901

SmartCrawl SEO checker, analyzer & optimizer <= 3.16.4 - Authenticated (Contributor+) Insecure Direct Object Reference

2026-10-16 12:49
AndrewN

Strategic Overview

Status
Patched in 3.17.1
Affected Plugin
SmartCrawl SEO checker, analyzer & optimizer
Affected Version
<= 3.16.4
CVSS
4.3Medium
Weakness type
CWE-639 · Authorization Bypass Through User-Controlled Key
CVE
CVE-2026-110901
View all SmartCrawl SEO checker, analyzer & optimizer vulnerabilities

At a glance

CVE-2026-110901 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the SmartCrawl SEO checker, analyzer & optimizer WordPress plugin, affecting versions <= 3.16.4. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Contributor level or above. The issue is fixed in version 3.17.1; sites on affected versions should update now. Disclosed October 2026, reported by AndrewN.

Vulnerability Overview

The SmartCrawl SEO checker, analyzer & optimizer plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.16.4. This is due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to perform an unauthorized action.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in SmartCrawl SEO checker, analyzer & optimizer <= 3.16.4 takes an account at Contributor level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For SmartCrawl SEO checker, analyzer & optimizer the fix is 3.17.1: builds <= 3.16.4 are affected, anything from 3.17.1 onward is not.

Remediation

Update to version 3.17.1, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: SmartCrawl SEO checker, analyzer & optimizer 3.17.1 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-110901https://www.wordfence.com/threat-intel/vulnerabilities/id/e4d83fa6-338f-402c-94d9-b18caa45fe31https://nvd.nist.gov/vuln/detail/CVE-2026-110901

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C