WP Fastest Cache – WordPress Cache Plugin 0.8.7.7 — 1.5.0 - Unauthenticated Cache Poisoning
CVE-2026-74916Published · Updated Action summary
Affected: 0.8.7.7 – 1.5.0Update to 1.5.1 or newer
All remediation steps- Severity
- Medium6.1
- CVSS
- 6.1CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
WP Fastest Cache – WordPress Cache Plugin wp-fastest-cache
- Affected0.8.7.7 – 1.5.0
- Patched in1.5.1
Update to 1.5.1 or newer.
You are affected if you run 0.8.7.7 – 1.5.0. Version 1.5.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under WP Fastest Cache – WordPress Cache Plugin.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.5.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch WP Fastest Cache – WordPress Cache Plugin to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Amity Gilmour.
The WP Fastest Cache – WordPress Cache Plugin plugin for WordPress is vulnerable to Cache Poisoning in versions 0.8.7.7 through 1.5.0. This is due to missing exclusion of requests with query strings from the page cache, allowing cache entries for clean URLs to be overwritten by requests carrying arbitrary query parameters. This makes it possible for unauthenticated attackers to poison the page cache by requesting a URL with tracking query parameters, causing their rendered page context to be stored and served to every subsequent visitor of the clean URL.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in WP Fastest Cache – WordPress Cache Plugin
All 39| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.9 | Unauthenticated Sensitive Information Exposure via Cached wp-activate.php Response ≤1.5.3Update to 1.5.4 | CVE-2026-111464 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via HTTP Host Header ≤1.5.0Update to 1.5.1 | CVE-2026-19760 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤1.5.0Update to 1.5.1 | CVE-2026-74932 | |
| Medium4.3 | Missing Authorization to Authenticated (Subscriber+) DB Cleanup Actions ≤1.4.0Update to 1.4.1 | CVE-2025-10476 | |
| High7.2 | Authenticated (Administrator+) Arbitrary File Deletion ≤1.2.6Update to 1.2.7 | CVE-2024-4347 |
- Medium5.9Unauthenticated Sensitive Information Exposure via Cached wp-activate.php Response
≤1.5.3Update to 1.5.4
- High7.2Unauthenticated Stored Cross-Site Scripting via HTTP Host Header
≤1.5.0Update to 1.5.1
- High7.2Unauthenticated Stored Cross-Site Scripting
≤1.5.0Update to 1.5.1
- Medium4.3Missing Authorization to Authenticated (Subscriber+) DB Cleanup Actions
≤1.4.0Update to 1.4.1
- High7.2Authenticated (Administrator+) Arbitrary File Deletion
≤1.2.6Update to 1.2.7
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.1
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.