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CVE-2026-111464

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

Products / packages emrevona WP Fastest Cache – WordPress Cache Plugin

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 02:25:31 UTC
Wordfence · CVSS:3.1 · 5.9
Assessment vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity

medium5.9

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

WP Fastest Cache plugin versions up to 1.5.3 are vulnerable to sensitive information exposure. Unauthenticated attackers can retrieve a plaintext username and password from a cached response. Exploitation requires a Multisite subdirectory installation with public registration enabled.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

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.

Excerpt from the original source description below.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

emrevona · Wordfence

WP Fastest Cache – WordPress Cache Plugin

1 range
Wordfence version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → through 1.5.3

semver versions

unaffected

unknown

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher 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.

References

7 sources
www.wordfence.com/threat-intel/vulnerabilities/id/83539a88-b90e-49f0-a599-b3f83b2d97b9
Security advisoryWordfence
plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php
Source referenceWordfence
plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php
Source referenceWordfence
plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php
Source referenceWordfence
plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php
Source referenceWordfence
plugins.trac.wordpress.org/browser/wp-fastest-cache/tags/1.5.2/inc/cache.php
Source referenceWordfence
View 1 more references
plugins.trac.wordpress.org/changeset/3749897/wp-fastest-cache
PatchWordfence

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-111464

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-524 ↗

CWE-524 Use of Cache Containing Sensitive Information

Wordfence

Related →
Contributing organizations · 2
Wordfence

Assigning organization

2026-11-03
CISA-ADP

Additional data publisher

2026-11-03

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-111464

    Observed 2026-11-03T13:30:41.835Z · upstream updated 2026-11-03T13:23:51.631Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-03T13:23:01.915368Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.