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CVE-2026-12408— Slim SEO <= 4.9.8 - Authenticated (Contributor+) Insufficient Authorization to Private Content Disclosure via 'object.ID' Parameter

Quick assessment

Affected
rilwis Slim SEO – A Fast & Automated SEO Plugin For WordPress
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

eLightUp Slim SEO是eLightUp公司的一款快速自动化的WordPress SEO插件。 WordPress Slim SEO存在信息泄露漏洞，该漏洞源于端点权限检查不完整，仅执行顶级的edit_posts能力检查，未验证用户对特定object.ID参数指定帖子的读取权限，导致具有贡献者及以上权限的认证攻击者能够检索作者设置为私有、草稿等受保护内容的AI生成摘要，造成未授权私有内容泄露。以下版本受到影响：4.9.8及之前版本。

CVSS 4.3 · Medium EPSS 0.42% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
rilwis Slim SEO – A Fast & Automated SEO Plugin For WordPress ≤ 4.9.8 affected
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I. Basic Information for CVE-2026-12408

Vulnerability Information
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Vulnerability Title
Slim SEO <= 4.9.8 - Authenticated (Contributor+) Insufficient Authorization to Private Content Disclosure via 'object.ID' Parameter
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Slim SEO 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
eLightUp Slim SEO是eLightUp公司的一款快速自动化的WordPress SEO插件。 WordPress Slim SEO存在信息泄露漏洞，该漏洞源于端点权限检查不完整，仅执行顶级的edit_posts能力检查，未验证用户对特定object.ID参数指定帖子的读取权限，导致具有贡献者及以上权限的认证攻击者能够检索作者设置为私有、草稿等受保护内容的AI生成摘要，造成未授权私有内容泄露。以下版本受到影响：4.9.8及之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rilwis Slim SEO – A Fast & Automated SEO Plugin For WordPress 0 ~ 4.9.8 -

II. Public POCs for CVE-2026-12408

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III. Intelligence Information for CVE-2026-12408

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Patches & Fixes for CVE-2026-12408 (2)

Vendor Advisories for CVE-2026-12408 (2)

Vendor Pages for CVE-2026-12408 (1)

IV. Related Vulnerabilities

Same product: Slim SEO – A Fast & Automated SEO Plugin For WordPress
Same vendor: rilwis
Same weakness: CWE-200

V. Comments for CVE-2026-12408

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