AI Engine – The Chatbot, AI Framework & MCP for WordPress <= 3.8.6 - Missing Authorization to Administrator Account Takeover via…
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
The AI Engine WordPress plugin (the chatbot, AI framework, and MCP add-on) is affected, specifically its MCP OAuth client registration feature. An unauthenticated attacker could use this flaw to gain full administrator-level control of the affected WordPress site, such as creating users and changing settings, if an administrator approves the attacker's client, which the attacker could try to obtain through clickjacking.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
The AI Engine – The Chatbot, AI Framework & MCP for WordPress plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.8.6 This is due to the MCP module's OAuth 2.1 Dynamic Client Registration endpoint (/wp-json/mcp/v1/oauth/register) being registered with a permission_callback of __return_true, allowing an unauthenticated user to register an active OAuth client with an attacker-controlled redirect URI. This makes it possible for unauthenticated attackers to obtain an administrator-bound MCP access token, and thereby full administrator-level control through the MCP tools (including user creation and option updates), once an administrator approves the attacker's client on the OAuth consent screen. The consent page is additionally served without X-Frame-Options or Content-Security-Policy frame-ancestors, so that approval can be obtained via clickjacking.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- tigroumeow AI Engine – MCP Server & AI Chatbot for WordPress, with Claude, ChatGPT & Gemini
through 3.8.6
References 8
plugins.trac.wordpress.org
- browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L1159
- browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L496
- browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L317
- browser/ai-engine/tags/3.8.3/labs/mcp-oauth.php#L609
- browser/ai-engine/tags/3.8.3/labs/mcp.php#L232
- changeset?reponame=&new=3760852%40ai-engine%2Ftags%2F3.8.7&old=3757660%40ai-engine%2Ftags%2F3.8.6
- changeset/3760851/ai-engine/trunk/labs/mcp-oauth.php