barrykooij Related Posts Plugin up to 3.0.0 on WordPress Link Management LinkRepository::insert rp4wp_create_link information disclosure

Summaryinfo

A vulnerability identified as problematic has been detected in barrykooij Related Posts Plugin up to 3.0.0. Impacted is the function LinkRepository::insert of the component Link Management. The manipulation of the argument rp4wp_create_link leads to information disclosure. This vulnerability is documented as CVE-2026-109979. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in barrykooij Related Posts Plugin up to 3.0.0. It has been rated as problematic. This issue affects the function LinkRepository::insert of the component Link Management. The manipulation of the argument rp4wp_create_link with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-109979 since 10/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• barrykooij

Name

• Related Posts Plugin

Version

• 3.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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CVSSv2info

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Threat Intelligenceinfo

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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