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SmartCrawl CVE-2026-110901

| EUVDEUVD-2026-102862 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-10-16 Patchstack GHSA-rgf9-cfvx-22f4
5.4
CVSS 3.1 · Vendor: Patchstack
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain low-privilege account
  2. Exploit
    Send request with manipulated object key
  3. Execution
    Bypass access-control check (IDOR)
  4. Impact
    Read or modify unauthorized SEO data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
Exploitation Conditions

Requires an authenticated session on the target WordPress site: per the CVSS vector PR:L, the attacker must already hold a low-privilege account (e.g., subscriber/contributor-level or any registered user), which limits exploitation to sites that allow or have such accounts. No user interaction and no special non-default configuration is indicated by the input. The vulnerable component is the SmartCrawl (smartcrawl-seo) plugin at versions from an unspecified start through 3.16.4; sites on later versions are not affected. The limiting factor is the authentication requirement - this is not a remote-unauthenticated flaw - which meaningfully constrains real-world risk relative to the network attack vector.

Impact

This is a moderate-severity, low-priority issue absent additional exploitation signals. The provided CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N, base 5.4) indicates a network-reachable, low-complexity attack requiring low-level privileges (PR:L) - i.e., any authenticated account such as a subscriber or contributor - with no user interaction, yielding only low confidentiality and low integrity impact and no availability impact. There is no public exploit identified at time of analysis (no POC indicator in the input), the CVE is not listed in CISA KEV, and no EPSS probability was supplied, so there is no evidence of active or likely imminent exploitation. The CWE-639 (Authorization Bypass Through User-Controlled Key / IDOR) classification is consistent with the PR:L and partial-impact scoring: an authenticated user manipulates an object reference to access or modify data outside their authorization scope. Net assessment: a legitimate IDOR worth patching on normal cadence, but not a drop-everything priority. Key missing signals to note explicitly: EPSS score is absent (cannot quantify exploitation probability), POC/exploit-code status is not stated in the input, and no independent vendor advisory beyond the Patchstack database entry was provided to confirm affected-version boundaries.

Exploit ScenarioDerived

An attacker who holds any low-privilege authenticated account on a WordPress site running SmartCrawl 3.16.4 or earlier submits a request manipulating a user-controlled object identifier (key/ID) to read or alter SEO configuration or data belonging to other users or resources they should not reach. Because the attack is network-based, low-complexity, and needs no victim interaction (AV:N/AC:L/UI:N), it can be performed directly against the plugin's endpoints once authenticated. No public exploit code was identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 16, 2026

Authorization bypass in SmartCrawl (smartcrawl-seo) through version 3.16.4 allows an authenticated low-privilege user to manipulate a user-controlled key and access or modify data they should not be able to access, due to CWE-639 insecure direct object reference and incorrect access control configuration. This is a moderate-severity issue (CVSS 5.4, AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N) whose real-world risk is constrained by the requirement for a valid low-privilege account; no public exploit identified at time of analysis, and no KEV or EPSS signal was provided. Sites running affected SmartCrawl versions should monitor the Patchstack advisory and update beyond 3.16.4 once a fixed release is confirmed.

RemediationAI

No vendor-released patch identified at time of analysis in the provided data; the affected range ends at 3.16.4, so verify whether the vendor has published a release later than 3.16.4 and apply it as the primary remediation. Because the flaw requires an authenticated low-privilege account (PR:L), reduce exposure by restricting or closing user registration, downgrading or removing untrusted subscriber/contributor accounts, and enforcing least privilege on WordPress roles. As a compensating control, restrict access to SmartCrawl admin, REST, and AJAX functionality to trusted roles or specific IPs using a WAF or security plugin, but this may break legitimate plugin features for lower-privileged users and requires testing. Disabling the SmartCrawl plugin removes the vulnerable code path entirely at the cost of losing its SEO functionality. Review logs for user-controlled object ID tampering and monitor https://patchstack.com/database/wordpress/plugin/smartcrawl-seo/vulnerability/wordpress-smartcrawl-plugin-3-16-4-insecure-direct-object-references-idor-vulnerability?_s_id=cve for updates.

Affected VersionsENISA

SmartCrawl 0 ≤3.16.4

Affected Packages

euvd smartcrawl no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

SmartCrawl is a WordPress SEO plugin maintained by WPMU DEV, and the CPE cpe:2.3:a:wpmu_dev:smartcrawl:*:*:*:*:*:*:*:* identifies the affected product generically across versions. CWE-639 (Authorization Bypass Through User-Controlled Key) describes an IDOR-style root cause: an object identifier or key supplied by the requester, such as a post ID, user ID, or settings key, is used without verifying that the authenticated user owns or is authorized for that object. In WordPress, this typically manifests through REST API routes, admin-ajax actions, or direct plugin admin pages that fail to perform capability checks or nonce/ownership validation. The CVSS vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N indicates the attack is network-reachable, low complexity, requires low privileges (an authenticated account), needs no user interaction, and yields partial confidentiality and integrity impact with no availability impact. The independent assessment notes the flaw is not remote-unauthenticated; the PR:L prerequisite meaningfully limits exploitation to sites with registered low-privilege users or open registration. Affected range is unspecified start through 3.16.4; later versions are not affected.

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Severity by source

Vendor (Patchstack) PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
vuln.today AI 5.4 MEDIUM

IDOR reachable over the network by any low-privilege authenticated user (PR:L, AV:N, AC:L, UI:N) granting unauthorized read and modify of limited data (C:L/I:L), no availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionCVE.org

Authorization Bypass Through User-Controlled Key vulnerability in WPMU DEV SmartCrawl smartcrawl-seo allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects SmartCrawl: from n/a through 3.16.4.

Threat Intelligence Overview

EPSS Score
0.1%
Top 96% exploitable
Prevalence
Medium
popular WPMU DEV WordPress SEO plugin, common but not universal
Social Media
1
Sightings
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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