WP Fastest Cache 0.9.0.3 - 1.5.0 - Unauthenticated Stored XSS via Host Header Cache Poisoning
Priority LOW 35CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The WP Fastest Cache WordPress plugin before 1.5.1 does not validate the Host header before using it to build the URLs of the asset files it embeds in the pages it caches, and does not include that header in the cache key, allowing unauthenticated attackers to poison cached pages with references to a server they control and have arbitrary JavaScript run for every subsequent visitor.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00373 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed WP Fastest Cache (Unknown): 1.5.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | WP Fastest Cache | 0.9.0.3 to before 1.5.1 | 1.5.1 | Patch available | CNA |
- WP Fastest Cache VendorUnknown Affected 0.9.0.3 to before 1.5.1 Fixed in 1.5.1 Patch available CNA
Remediation
- Fix · CNA WP Fastest Cache (Unknown) Fixed in 1.5.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74932
- 2026-10-03 Alias added: GHSA-862p-vrqf-hqpw
References
Sources
- CVE-2026-74932 · CVE Program
- CVE-2026-74932 · NVD
- FIRST EPSS
- GHSA-862p-vrqf-hqpw · GitHub Advisory Database · CC BY 4.0
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