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CVE-2026-107763— Fastcache by Host.it <= 1.7.5 - Missing Authorization to Authenticated (Subscriber+) Arbitrary .htaccess Page-Cache Block Modification via updateSettings() admin_action_update Hook

Quick assessment

Affected
hostspa Fastcache by Host.it
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 的 Host.it Fastcache 插件在所有 1.7.5 及以下版本中存在授权绕过漏洞。该漏洞源于插件未对用户是否具备执行某项操作的权限进行正确验证。这使得拥有订阅者（Subscriber）及以上权限的已认证攻击者，能够在站点根目录的 .htaccess 文件中添加或删除该插件的页面缓存重写规则。

CVSS 4.3 · Medium EPSS 0.21% · P11

Possible ATT&CK Techniques 2 AI

T1078 · Valid Accounts T1551.001
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I. Basic Information for CVE-2026-107763

Vulnerability Information
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Vulnerability Title
Fastcache by Host.it <= 1.7.5 - Missing Authorization to Authenticated (Subscriber+) Arbitrary .htaccess Page-Cache Block Modification via updateSettings() admin_action_update Hook
Source: CVE Program / CVE List V5
Vulnerability Description
The Fastcache by Host.it plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.7.5. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to add or remove the plugin's page-cache rewrite rules in the site's root .htaccess file.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hostspa Fastcache by Host.it 0 ~ 1.7.5 -

II. Public POCs for CVE-2026-107763

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III. Intelligence Information for CVE-2026-107763

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Patches & Fixes for CVE-2026-107763 (1)

Vendor Advisories for CVE-2026-107763 (1)

Vendor Pages for CVE-2026-107763 (1)

Other References for CVE-2026-107763 (2)

IV. Related Vulnerabilities

Same product: Fastcache by Host.it
Same vendor: hostspa
Same weakness: CWE-862

V. Comments for CVE-2026-107763

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