Path traversal in W3 Total Cache plugin exposes server files
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-22 and the CVSS impact.
Summary
The W3 Total Cache WordPress plugin before 2.10.6 does not confine a media-import file copy to the document root and does not enforce an effective file-type restriction on it, which is a path traversal flaw (CWE-22). A user with the Author role or higher can plant content that, once an administrator runs the import, copies an arbitrary server-readable file into a publicly served directory. An unauthenticated attacker can then retrieve that file. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The W3 Total Cache WordPress plugin before 2.10.6 does not confine a media-import file copy to the document root, nor enforce an effective file-type restriction on it, allowing users with the Author role or higher to plant content that, once an administrator runs the import, copies an arbitrary server-readable file into a publicly served directory, exposing it to unauthenticated retrieval.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 | W3 Total Cache | before 2.10.6 | 2.10.6 | Patch available | CNA |
- W3 Total Cache VendorUnknown Affected before 2.10.6 Fixed in 2.10.6 Patch available CNA
Remediation
Update W3 Total Cache to version 2.10.6, the fixed version.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA W3 Total Cache (Unknown) Fixed in 2.10.6
Timeline
- 2026-10-10 Threatist record created from CVE-2026-107321
- 2026-10-10 Alias added: GHSA-445r-vc94-h34g
- 2026-10-11 CVSS score added · CISA ADP
- 2026-10-11 Weakness changed · CISA ADP
- 2026-10-11 CISA SSVC decision points changed
References
Sources
- CVE-2026-107321 · CVE Program
- CVE-2026-107321 · NVD
- FIRST EPSS
- GHSA-445r-vc94-h34g · GitHub Advisory Database · CC BY 4.0
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