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CVE Record

CVE-2019-6726: The WP Fastest Cache plugin through 0.8.9.0 for WordPress allows remote attackers to delete arbitrary files...

The WP Fastest Cache plugin through 0.8.9.0 for WordPress allows remote attackers to delete arbitrary files because wp_postratings_clear_fastest_cache and rm_folder_recursively in wpFastestCache.php mishandle ../ in an HTTP Referer header.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2019-6726 affects WP Fastest Cache for WordPress through version 0.8.9.0. A remote attacker may be able to cause arbitrary file deletion by abusing how the plugin handles the HTTP Referer header. For business leaders, this is mainly a website integrity and availability risk.

Executive priority

Prioritize remediation for internet-facing WordPress sites using affected plugin versions, especially revenue, brand, or customer-facing sites. The issue can affect availability and integrity even without evidence of active exploitation in the provided sources.

Technical view

The CVE describes path traversal handling failure in wp_postratings_clear_fastest_cache and rm_folder_recursively in wpFastestCache.php. The vulnerable logic mishandles ../ sequences supplied via an HTTP Referer header, allowing remote arbitrary file deletion in affected WP Fastest Cache versions through 0.8.9.0.

Likely exposure

Exposure is limited to WordPress sites running WP Fastest Cache at version 0.8.9.0 or earlier. The source bundle does not identify affected hosting platforms, configurations, or required authentication state beyond remote attacker reachability.

Exploitation context

The CVE has a public Packet Storm reference, but the bundle does not show CISA KEV listing or confirmed active exploitation. Treat this as publicly known and plausibly testable, but do not claim active exploitation from the provided evidence.

Researcher notes

The bundle lacks CVSS, CWE, exploit preconditions, and fixed-version detail. Analysis should stay anchored to the named vulnerable functions, affected version range, and Referer path traversal behavior. Validate against vendor changelog before asserting a specific patched version.

Mitigation direction

  • Inventory WordPress sites using WP Fastest Cache and record installed versions.
  • Prioritize sites running WP Fastest Cache 0.8.9.0 or earlier.
  • Check vendor and WordPress plugin guidance for the fixed or current safe release.
  • Upgrade, disable, or replace the plugin according to approved vendor guidance.
  • Restore deleted or altered files from known-good backups if compromise is suspected.

Validation and detection

  • Confirm whether WP Fastest Cache is installed on each WordPress site.
  • Verify the installed plugin version is not 0.8.9.0 or earlier.
  • Review web logs for suspicious Referer traversal patterns against cache-clearing paths.
  • Check site file integrity for unexpected deletion or missing WordPress files.
  • Review backups and monitoring alerts around the suspected exposure window.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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CVE-2019-6726 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.