CVE-2026-12408

MEDIUM

Slim SEO <= 4.9.8 - Authenticated (Contributor+) Insufficient Authorization to Private Content Disclosure via 'object.ID' Parameter

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-12408. PoCs published by HermesNA-1.

AI-analyzed exploit summary This repository contains an auto-generated stub module for CVE-2026-12408, an unauthorized private content disclosure vulnerability in the Slim SEO WordPress plugin (versions ≤4.9.8). The code includes placeholder logic for probing a target but lacks actual exploit implementation, referencing vulnerable code paths in the plugin's AI.php and Data.php files.

Description

The Slim SEO – A Fast & Automated SEO Plugin For WordPress plugin for WordPress is vulnerable to Unauthorized Private Content Disclosure in all versions up to, and including, 4.9.8 via the `/wp-json/slim-seo/meta-tags/ai` REST API endpoint. This is due to the endpoint's `permission_callback` performing only a top-level `edit_posts` capability check without verifying that the requesting user has read access to the specific post supplied via the `object.ID` parameter, allowing the `generate` function to pass the attacker-controlled post ID to `Data::get_post_content()`, which calls `get_post()` regardless of post status or ownership. This makes it possible for authenticated attackers with Contributor-level access and above to retrieve AI-generated summaries of the raw `post_content` of arbitrary posts they are not authorized to view — including private posts, drafts, pending, future, and password-protected content authored by other users — with the substance of the protected content disclosed via the HTTP response.

Exploits (1)

github STUB 1 stars
by HermesNA-1 · pythonpoc
https://github.com/HermesNA-1/SnakeSploit/tree/main/data/modules_generated/cve-2026-12408_the_slim_seo.py

This repository contains an auto-generated stub module for CVE-2026-12408, an unauthorized private content disclosure vulnerability in the Slim SEO WordPress plugin (versions ≤4.9.8). The code includes placeholder logic for probing a target but lacks actual exploit implementation, referencing vulnerable code paths in the plugin's AI.php and Data.php files.

Classification
Stub 98%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Theoretical
Target: Slim SEO – A Fast & Automated SEO Plugin For WordPress (versions up to and including 4.9.8)
No auth needed
Prerequisites: Target must be running a vulnerable version of Slim SEO plugin (≤4.9.8) · WordPress REST API endpoint (/wp-json/slim-seo/v1/...) must be accessible
mistral-large-3 · analyzed Jul 09, 2026 Full analysis →

Scores

CVSS v3 4.3
EPSS 0.0026
EPSS Percentile 17.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-200
Status published
Products (1)
rilwis/Slim SEO – A Fast & Automated SEO Plugin For WordPress < 4.9.8
Published Jul 01, 2026
Tracked Since Jul 01, 2026