CVE-2026-78397— Link Library < 7.9.6 - Unauthenticated SSRF via Reciprocal Link Validation
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.
WordPress 插件 Link Library 在 7.9.6 版本之前存在安全漏洞。当插件发起的安全请求被拒绝时，它会回退到一个未受保护的获取方式，但未对用户提供的 URL 目标进行验证。这使得未认证的访问者能够利用该站点向内部网络中的主机发起请求，并通过响应内容判断内部服务是否活跃，从而泄露内网信息。 版本低于 7.8.8 的受此漏洞影响（CVE-2025-68600 已覆盖该范围）；本条目描述的是 7.8.8 至 7.9.5 版本，在这些版本中此前修复不完整。要利用此漏洞，网站管理员必须已启用反向链接验证
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I. Basic Information for CVE-2026-78397
Vulnerability Information
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Vulnerability Title
Link Library < 7.9.6 - Unauthenticated SSRF via Reciprocal Link Validation
Source: CVE Program / CVE List V5
Vulnerability Description
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, allowing 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.
Versions below 7.8.8 are covered by CVE-2025-68600; this entry covers 7.8.8 through 7.9.5, where that fix was incomplete. Exploitation requires the site owner to have published the Link Library WordPress plugin before 7.9.6's public link submission form with reciprocal-link validation enabled.
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 | 7.8.8 ~ 7.9.6 | - |
|
II. Public POCs for CVE-2026-78397
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-78397 (1)
-
https://wpscan.com/vulnerability/7842ef44-582c-40a8-8f3c-cf8abebaf7fb/ 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-2026-78394 | Link Library < 7.9.6 - Contributor+ Path Traversal via 'filepath' Parameter | |
| CVE-2026-78393 | Link Library < 7.9.6 - Reflected XSS via 'link_tags' and 'link_price' Sort and Breadcrumb |
IV. Related Vulnerabilities
Same product: Link Library
-
CVE-2026-78394
Link Library < 7.9.6 - Contributor+ Path Traversal via 'file -
CVE-2026-78393
Link Library < 7.9.6 - Reflected XSS via 'link_tags' and 'li -
CVE-2026-18855
Link Library <= 7.9.4 - Unauthenticated Arbitrary File Delet -
CVE-2026-16535
Link Library < 7.9.4 - Reflected XSS via Thumbs-Rating likel -
CVE-2026-16532
Link Library < 7.9.3 - Unauthenticated SQL Injection via the
Same vendor: Unknown
-
CVE-2026-92996
Verge3D 4.1.0 - 4.13.0 - Unauthenticated Payment Bypass via -
CVE-2026-89411
Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbo -
CVE-2026-86838
Bookly < 28.3 - Unauthenticated Payment Bypass via Booking P -
CVE-2026-88828
Blacklist Manager for WooCommerce 1.3.0 - 2.3.1 - Blocked Us -
CVE-2026-84744
WPForms Lite 1.5.0.1 - 2.0.2 - Unauthenticated Arbitrary Sho
V. Comments for CVE-2026-78397
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