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Kali Forms CVE-2026-81276

| EUVDEUVD-2026-66953 MEDIUM
Missing Authorization (CWE-862)
2026-08-27 Patchstack GHSA-5gf4-wfg9-qcwr
5.3
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
    Identify WordPress site with Kali Forms ≤ 2.4.23
  2. Exploit
    Send unauthenticated HTTP request to vulnerable plugin endpoint
  3. Execution
    Bypass missing authorization check
  4. Impact
    Perform unauthorized modification of form data or settings

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

The Kali Forms plugin must be installed and active on the target WordPress site running version 2.4.23 or earlier. The CVSS vector AV:N/AC:L/PR:N/UI:N indicates no special conditions beyond network reachability: no authentication is required, no non-default configuration must be present, and no victim interaction is needed. The specific endpoint(s) lacking authorization are not enumerated in the available intelligence, but CWE-862 and the 'Authentication Bypass' tag confirm that at least one plugin action is reachable without identity verification. Exploitation is constrained to integrity impact (I:L) - actions that would require higher privileges or affect confidentiality or availability are not implicated by the available data.

Impact

The CVSS 3.1 base score of 5.3 (Medium) is driven by the highly accessible attack surface (AV:N/AC:L/PR:N/UI:N) offset by the narrow impact (I:L only, C:N, A:N, S:U). EPSS data was not provided in the available intelligence, so exploitation probability cannot be quantified further. KEV status is negative and no public proof-of-concept has been identified at time of analysis, placing this in the lowest active-threat tier despite the unauthenticated vector. The real-world priority is moderate: the missing authorization pattern is trivially discoverable through manual plugin code review or automated WordPress scanning tooling, meaning even without a published exploit the vulnerability surface is thin. The bounded integrity-only impact limits blast radius - attackers cannot exfiltrate data or take the site offline via this vulnerability alone - but unauthorized form manipulation could enable phishing form substitution or data poisoning as a stepping stone.

Exploit ScenarioDerived

An unauthenticated attacker sends a crafted HTTP POST request to a WordPress AJAX endpoint (wp-admin/admin-ajax.php or a REST route) exposed by the Kali Forms plugin, specifying an action or route that lacks capability verification. Because no nonce or role check is enforced, the server processes the request as if the caller were a privileged user, allowing the attacker to modify form configurations, inject malicious field definitions, or alter submission routing. No public proof-of-concept has been identified at time of analysis, but the attack pattern is standard for WordPress broken access control and requires no specialized tooling.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 27, 2026

Broken access control in the Kali Forms WordPress plugin (versions ≤ 2.4.23) exposes one or more plugin endpoints to unauthenticated remote attackers due to missing authorization checks (CWE-862). The CVSS vector AV:N/AC:L/PR:N/UI:N confirms exploitation requires no authentication and no user interaction against any internet-exposed WordPress site running an affected version. Impact is constrained to integrity (I:L), indicating unauthorized modification of form data or plugin state, with no confidentiality or availability consequences identified. No public exploit or active exploitation has been identified at time of analysis.

RemediationAI

Update the Kali Forms plugin to a version released after 2.4.23 via the WordPress plugin repository or the plugin vendor. A specific patched release version was not independently confirmed in the available intelligence - consult the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/kali-forms/vulnerability/wordpress-kali-forms-plugin-2-4-23-broken-access-control-vulnerability and the WordPress.org plugin changelog for the current safe release. If an immediate update is not feasible, temporarily deactivating the Kali Forms plugin eliminates the vulnerable endpoint entirely, though this disables all form functionality on the site. WordPress-aware WAF rules (such as Wordfence or Patchstack's virtual patching layer) may provide interim blocking of exploitation attempts, but rule coverage for this specific vulnerability is not confirmed without payload-level signatures.

Affected VersionsENISA

Kali Forms n/a ≤2.4.23

Affected Packages

euvd kali_forms 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

Kali Forms is a WordPress form builder plugin developed by WP Chill, identified by CPE cpe:2.3:a:wp_chill:kali_forms:*:*:*:*:*:*:*:*. CWE-862 (Missing Authorization) describes a root cause where server-side code fails to verify whether the requesting principal holds the required capability or role before executing a privileged operation. In the WordPress plugin ecosystem this typically manifests as AJAX handlers or REST API routes registered without check_ajax_referer, current_user_can, or equivalent authorization guards, allowing any HTTP client to invoke actions that should be restricted to editors or administrators. The CVSS scope is unchanged (S:U), meaning the flaw is contained within the plugin's own security boundary.

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Severity by source

Vendor (Patchstack) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI 5.3 MEDIUM

Network-accessible unauthenticated endpoint with missing authorization yields AV:N/PR:N; impact is limited to integrity modification with no data disclosure or availability disruption confirmed.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

DescriptionCVE.org

Unauthenticated Broken Access Control in Kali Forms <= 2.4.23 versions.

Threat Intelligence Overview

EPSS Score
0.3%
Top 80% exploitable
Prevalence
Low
niche WordPress form builder plugin, limited market share
Data Quality
4 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 0.3%
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· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
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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