CVE-2026-78394— Link Library < 7.9.6 - Contributor+ Path Traversal via 'filepath' Parameter
Quick assessment
Affected
Unknown 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.
在 WordPress 的 Link Library 插件 7.9.6 版本之前，该插件在将生成的图像写入磁盘之前，未对用户提供的目标文件夹路径进行清理（sanitization）。这一漏洞允许具备“Contributor”角色及以上权限的用户创建目录，并在 Web 服务器具有写入权限的任何位置（包括站点文档根目录之外）写入或覆盖图像文件。 由于写入的文件名始终为纯数字并带有固定的图像扩展名，因此攻击者无法通过此方式植入可执行代码。
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I. Basic Information for CVE-2026-78394
Vulnerability Information
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Vulnerability Title
Link Library < 7.9.6 - Contributor+ Path Traversal via 'filepath' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | Link Library | 0 ~ 7.9.6 | - |
|
II. Public POCs for CVE-2026-78394
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-78394 (1)
-
https://wpscan.com/vulnerability/9da07b4f-5332-4ba5-8a34-6f2ed303b62c/ exploit vdb-entry technical-description
Same Patch Batch · Unknown · 2026-09-25 · 6 CVEs total
| CVE-2026-80514 | 5.3 MEDIUM | wpForo Forum 3.0.0 - 3.1.5 - Unauthenticated AI Credit Exhaustion via IP Rate Limit Bypass |
| CVE-2026-86837 | 5.3 MEDIUM | Bookly < 28.3 - Unauthenticated Customer PII Update via Verification Bypass |
| CVE-2026-88848 | 4.2 MEDIUM | MasterStudy LMS 1.9 - < 3.7.50 - Subscriber+ Membership Plan Quota and Category Restrictio |
| CVE-2026-78397 | Link Library < 7.9.6 - Unauthenticated SSRF via Reciprocal Link Validation | |
| CVE-2026-78393 | Link Library < 7.9.6 - Reflected XSS via 'link_tags' and 'link_price' Sort and Breadcrumb |
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