CVE-2026-109979 The Related Posts for WordPress plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 3.0.0
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-109979?
CVE-2026-109979 is a medium-severity vulnerability in barrykooij Related Posts for WordPress, published on 28 Oct 2026.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-109979?
How do I fix CVE-2026-109979?
No fix has been published for CVE-2026-109979 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-109979 being exploited?
There is no known exploitation of CVE-2026-109979 in the wild and no public exploit code.
Sources
Also known as GHSA-88jc-p652-m75v.