Vulnerability · Published Aug 31, 2026 · Assigned by Patchstack
CVE-2026-81780WordPress Hash Form plugin <= 1.4.2 - Arbitrary File Upload vulnerability
Critical 10.0
In plain English
A critical-severity unrestricted file upload in Hash Form from hashthemes. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)0.5%top 55.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
Unauthenticated Arbitrary File Upload in Hash Form <= 1.4.2 versions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| hashthemes | Hash Form | n/a – through 1.4.2 |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H