What is the CVSS score of CVE-2026-40779?

CVE-2026-40779 has a CVSS 3.1 base score of 7.7 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H. EPSS exploitation probability: 0.3%.

Which versions of Link Library are affected by CVE-2026-40779?

The Link Library WordPress plugin (versions 7.8.8 and earlier) enables authenticated site contributors to delete arbitrary files, creating an insider threat that could disable websites by removing…

How to fix or mitigate CVE-2026-40779?

Within 24 hours: Deactivate the Link Library plugin and audit all user accounts with contributor-level or higher permissions to identify potential exposure. Within 7 days: Uninstall the plugin entirely and migrate to alternative link management solutions; if replacement is not immediately available, implement file-system access controls to restrict write/delete permissions on critical WordPress files. Within 30 days: Deploy file integrity monitoring (FIM) to detect unauthorized file deletions; restrict contributor account creation and implement mandatory access reviews; conduct forensic audit of file modification logs to confirm no critical files were deleted during active plugin use.

Link Library CVE-2026-40779

EUVD-2026-36986 HIGH

Path Traversal (CWE-22)

2026-06-15 Patchstack

GHSA-fgx4-f7jh-8whq

Path Traversal Link Library

7.7

CVSS 3.1 · Vendor: Patchstack

Severity by source

Vendor (Patchstack) PRIMARY

7.7 HIGH

AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

vuln.today AI

7.7 HIGH

Network-reachable WordPress endpoint (AV:N), straightforward traversal (AC:L), needs contributor account (PR:L), no victim interaction (UI:N), deletes files outside plugin scope (S:C), only availability impacted (A:H).

3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Jun 15, 2026 - 22:08 vuln.today

DescriptionCVE.org

Contributor Arbitrary File Deletion in Link Library <= 7.8.8 versions.

AnalysisAI

Arbitrary file deletion in the Link Library WordPress plugin (versions 7.8.8 and earlier) allows authenticated contributors to delete arbitrary files on the server via a path traversal flaw. Reported by Patchstack and tracked as EUVD-2026-36986, the issue enables low-privileged authors of WordPress content to disrupt site availability by removing critical files such as wp-config.php; no public exploit identified at time of analysis.

Technical ContextAI

Link Library is a WordPress plugin by Yannick Lefebvre (CPE cpe:2.3:a:yannick_lefebvre:link_library) used to manage and display link directories on WordPress sites. The flaw is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory, i.e., Path Traversal), meaning a file-handling routine in the plugin accepts attacker-controlled path input without canonicalizing or restricting it to an allowed directory, letting traversal sequences resolve to files outside the intended scope. Because WordPress contributor accounts can typically be obtained on sites that allow open registration or via compromised low-tier accounts, the traversal primitive becomes reachable from a normal authenticated plugin endpoint rather than an admin-only one.

RemediationAI

Upstream fix available per the Patchstack advisory; a released patched version is not independently confirmed in the provided data, so WordPress administrators should monitor the plugin page and upgrade Link Library to the first version above 7.8.8 as soon as it is published, consulting https://patchstack.com/database/wordpress/plugin/link-library/vulnerability/wordpress-link-library-plugin-7-8-8-arbitrary-file-deletion-vulnerability for the exact fixed release. As compensating controls while waiting for or unable to apply the patch, deactivate the Link Library plugin entirely (loses link-directory functionality on the site), restrict contributor account creation by disabling open registration in WordPress general settings (prevents anonymous attackers from acquiring the needed role at the cost of friction for legitimate contributors), audit existing contributor and author accounts and demote or remove any that are not strictly required, and place the WordPress admin area behind a virtual patch via a WAF rule blocking the vulnerable plugin endpoint (may require Patchstack or similar managed rules and can interfere with legitimate plugin AJAX calls).