Related Posts for WordPress <= 3.0.0 - Missing Authorization to Authenticated (Contributor+) Sensitive Information Exposure via 'rp4wp_create_link' Parameter
Summary
| CVE | CVE-2026-109979 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-28 07:16:45 UTC |
| Updated | 2026-10-28 07:16:45 UTC |
| Description | The Related Posts for WordPress plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 3.0.0 via the 'rp4wp_create_link' parameter of the hidden 'rp4wp_link_related' admin page. The handle_create_link() handler verifies the nonce and that the current user can edit the parent post, but never checks that the attacker-supplied child post ID is one the user is allowed to read; LinkRepository::insert() stores the arbitrary child ID without validation, and ManageLinks::render() later calls LinkRepository::get_children() in its no-extra-args fast path, which falls through to array_map('get_post', $child_ids) — bypassing read_private_posts/read_post capability checks — and then echoes esc_html($child->post_title) in the parent's editor meta box. This makes it possible for authenticated attackers, with Contributor-level access and above, to read the titles of arbitrary non-public posts (drafts, pending, private, future, trashed) authored by higher-privileged users by linking those post IDs to a draft they own and then reading the resulting meta box. |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| 3.1 | CNA | DECLARED | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Barrykooij | Related Posts For WordPress | affected 3.0.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/related-posts-for-wp/tags/3.0.0/src/Links/LinkReposit... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/3ab9af6a-bfe7-4da5-8e60-b20f3... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset/3757484/related-posts-for-wp/trunk/src/Admin/LinkSc... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/related-posts-for-wp/tags/3.0.0/src/Admin/MetaBox/Man... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/related-posts-for-wp/tags/3.0.0/src/Admin/LinkScreen/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/related-posts-for-wp/tags/3.0.0/src/Links/LinkReposit... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Wordfence PRISM (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-20T19:46:39.000Z | Vendor Notified |
| CNA | 2026-10-27T17:56:45.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.