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CVE-2026-111464— WP Fastest Cache <= 1.5.3 - Unauthenticated Sensitive Information Exposure via Cached wp-activate.php Response

Quick assessment

Affected
emrevona WP Fastest Cache – WordPress Cache Plugin
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 WP Fastest Cache 插件在所有 1.5.3 及更早版本中存在敏感信息泄露漏洞。该插件在缓存 WordPress 核心 wp-activate.php 的响应时，未遵守其 no-store/no-cache 响应头、wp-activate-* Cookie 或 WP_INSTALLING 状态，从而将包含凭据的激活响应写入公开可访问的缓存文件。这使得未经身份验证的攻击者能够从该缓存的 wp-activate.php 响应中获取最近激活的多站点注册者的明文用户名和 12 位密码。利

CVSS 5.9 · Medium EPSS 0.42% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
emrevona WP Fastest Cache – WordPress Cache Plugin ≤ 1.5.3 affected
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I. Basic Information for CVE-2026-111464

Vulnerability Information
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Vulnerability Title
WP Fastest Cache <= 1.5.3 - Unauthenticated Sensitive Information Exposure via Cached wp-activate.php Response
Source: CVE Program / CVE List V5
Vulnerability Description
The WP Fastest Cache plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.5.3. The plugin caches the response of Core’s wp-activate.php without honoring its no-store/no-cache headers, the wp-activate-* cookie, or the WP_INSTALLING state, writing the credential-bearing activation response to a publicly accessible cache file. This makes it possible for unauthenticated attackers to retrieve the plaintext username and twelve-character password of the most recently activated Multisite registrant from that cached wp-activate.php response. Exploitation requires a Multisite subdirectory installation with public user and site registration enabled, and the credentials are only exposed after a genuine registrant follows their activation link.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过缓存导致的信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
emrevona WP Fastest Cache – WordPress Cache Plugin 0 ~ 1.5.3 -

II. Public POCs for CVE-2026-111464

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III. Intelligence Information for CVE-2026-111464

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Other References for CVE-2026-111464 (7)

IV. Related Vulnerabilities

Same product: WP Fastest Cache – WordPress Cache Plugin
Same vendor: emrevona
Same weakness: CWE-524