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wpForo Forum CVE-2026-40798

| EUVD-2026-36807 CRITICAL
SQL Injection (CWE-89)
2026-06-15 Patchstack GHSA-r7jj-7q7m-56qf
9.3
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
9.3 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
vuln.today AI
9.3 CRITICAL

Unauthenticated network SQLi against a WordPress plugin (PR:N, AV:N, AC:L); S:C and C:H from shared-DB exposure; I:L allowed because SQLi typically permits some data modification, A:N as no DoS path is described.

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

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
Low

Lifecycle Timeline

1
Analysis Generated
Jun 15, 2026 - 22:05 vuln.today

DescriptionCVE.org

Unauthenticated SQL Injection in wpForo Forum <= 3.0.4 versions.

AnalysisAI

Unauthenticated SQL injection in the wpForo Forum WordPress plugin (versions 3.0.4 and earlier) allows remote attackers to inject arbitrary SQL into backend database queries without any credentials or user interaction. With a CVSS 3.1 score of 9.3 and a scope-changing vector, exploitation can expose data beyond the plugin's own context, though no public exploit identified at time of analysis and the vulnerability is not currently listed in CISA KEV.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify WordPress site running wpForo ≤3.0.4
Delivery
Send crafted HTTP request with SQLi payload
Exploit
Bypass missing input sanitization
Execution
Inject SQL into backend query
Persist
Exfiltrate wp_users hashes and secrets
Impact
Crack credentials offline or pivot to admin takeover

Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against default installations of wpForo Forum plugin versions ≤3.0.4 on WordPress, with no user interaction required (CVSS AV:N/AC:L/PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N is maximally exposed - network-reachable, no authentication, no user interaction, low complexity - which is consistent with an unauthenticated SQLi reachable on any public WordPress site running the plugin. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated attacker sends a crafted HTTP request to a vulnerable wpForo endpoint (for example, a search, member-lookup, or forum-listing parameter) with SQL injection payloads, leveraging UNION-based or time-based techniques to extract data from the WordPress database. Because S:C/C:H applies, the attacker can read wp_users password hashes, wp_options secrets, and data from other plugins sharing the database - enabling subsequent offline cracking or session hijacking. …
Remediation Patch available per vendor advisory - administrators should upgrade wpForo Forum to a version newer than 3.0.4 as soon as a fixed release is published by tomdever/gVectors; consult the Patchstack advisory (https://patchstack.com/database/wordpress/plugin/wpforo/vulnerability/wordpress-wpforo-forum-plugin-3-0-4-sql-injection-vulnerability) and the WordPress.org plugin page for the exact patched version. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

24 hours: Audit all WordPress installations for wpForo versions 3.0.4 and earlier; immediately disable the plugin or restrict its access via firewall rules. …

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CVE-2026-40798 vulnerability details – vuln.today

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