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CVE-2026-18855— Link Library <= 7.9.4 - Unauthenticated Arbitrary File Deletion via link_url Parameter

Quick assessment

Affected
jackdewey Link Library
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Link Library是WordPress组织的一款网站链接管理插件。 WordPress Link Library plugin 7.9.4及之前版本存在路径遍历漏洞，该漏洞源于ll_delete_link_fields函数对文件路径验证不足，可能导致未经身份验证的攻击者删除服务器上的任意文件，进而可能导致远程代码执行。

CVSS 9.1 · Critical EPSS 1.21% · P67

Affected Version Matrix 1

VendorProduct Version RangeStatus
jackdewey Link Library ≤ 7.9.4 affected
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I. Basic Information for CVE-2026-18855

Vulnerability Information
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Vulnerability Title
Link Library <= 7.9.4 - Unauthenticated Arbitrary File Deletion via link_url Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Link Library plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the ll_delete_link_fields function in all versions up to, and including, 7.9.4 This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires the administrator to have enabled the 'Delete local file on link deletion' plugin option (disabled by default) and to subsequently permanently delete the attacker-submitted link, which is a routine moderation action.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Link Library 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Link Library是WordPress组织的一款网站链接管理插件。 WordPress Link Library plugin 7.9.4及之前版本存在路径遍历漏洞，该漏洞源于ll_delete_link_fields函数对文件路径验证不足，可能导致未经身份验证的攻击者删除服务器上的任意文件，进而可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
jackdewey Link Library 0 ~ 7.9.4 -

II. Public POCs for CVE-2026-18855

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III. Intelligence Information for CVE-2026-18855

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Patches & Fixes for CVE-2026-18855 (2)

Vendor Advisories for CVE-2026-18855 (1)

IV. Related Vulnerabilities

Same product: Link Library
Same vendor: jackdewey
Same weakness: CWE-22

V. Comments for CVE-2026-18855

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