CVE-2026-78394
MediumCVSS 4.1Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
The Link Library WordPress plugin before 7.9.6 does not sanitize a user-supplied destination folder before writing a generated image to disk. This allows users with the Contributor role and above to create directories and write or overwrite image files anywhere the web server can write, including outside the site's document root.
Risk Assessment
A user with Contributor privileges can write or overwrite image files outside the site directory, potentially leading to unauthorized changes in the file system. The written file name is always numeric with a fixed image extension, so executable code cannot be planted this way.
Recommendation
Upgrade the Link Library plugin to version 7.9.6 or later. Restrict the roles of users who can use the image generation feature.
Other vulnerabilities in Link Library WordPress plugin
See all- CVE-2026-78396Medium
The Link Library WordPress plugin before 7.10.0 does not verify that a requested link belongs to the settings set whose display template is used to render it. This allows unauthenticated users to disclose the telephone number, e-mail address and submitter name stored with links that the settings set is configured not to display.
- CVE-2026-78395Medium
The Link Library WordPress plugin before 7.10.0 does not re-check the selected library's own login requirement when processing its front-end link submission. This allows unauthenticated users to submit links to a library configured to require login by reusing a form token obtained from another library that does not.
- CVE-2026-78397Medium
The Link Library WordPress plugin before 7.9.6 does not validate the destination of a user-supplied URL before falling back to an unprotected fetch when its safe request is rejected. This allows unauthenticated visitors to make the site issue requests to hosts on its internal network and to learn from the response whether an internal service answered.
- CVE-2026-78393Medium
The Link Library WordPress plugin before 7.9.6 does not properly escape some parameters before outputting them in the addresses of links it generates on its front-end directory pages. This leads to Reflected Cross-Site Scripting (XSS) which could be used against any visitor, including logged-in administrators.
Original NVD description (English source)
The Link Library WordPress plugin before 7.9.6 does not sanitize a user-supplied destination folder before writing a generated image to disk, allowing users with the Contributor role and above to create directories and write or overwrite image files anywhere the web server can write, including outside the site's document root. The written file name is always numeric with a fixed image extension, so executable code cannot be planted this way.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS