CVE-2026-111464
WP Fastest Cache <= 1.5.3 - Unauthenticated Sensitive Information Exposure via Cached wp-activate.php Response
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.
INFO
Published Date :
Nov. 3, 2026, 3:16 a.m.
Last Modified :
Nov. 3, 2026, 3:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-111464
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update WP Fastest Cache plugin to version 1.5.4.
- Verify cache settings do not expose sensitive data.
- Disable public registration if multisite is not needed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-111464.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-111464 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-111464
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-111464 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-111464 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Nov. 03, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-524 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111464.json">CVE-2026-111464</a> Added Reference https://plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php#L1027 Added Reference https://plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php#L1400 Added Reference https://plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php#L452 Added Reference https://plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php#L567 Added Reference https://plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php#L83 Added Reference https://plugins.trac.wordpress.org/changeset/3749897/wp-fastest-cache Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/83539a88-b90e-49f0-a599-b3f83b2d97b9?source=cve