Taskbot WordPress plugin: Arbitrary file upload
Summary
The Taskbot WordPress plugin up to and including version 6.6 contains an arbitrary file upload vulnerability (CWE-434). An attacker with a subscriber-level account can upload files of their choice to the server, which can enable takeover of the website if the uploaded files are executed. The record and the Patchstack page rate it CVSS 9.9, but the vulnerability class is not confirmed by the advisory, since one source describes it as an arbitrary file read.
Affected
- Taskbot WordPress plugin (AmentoTech), versions up to and including 6.6
- Default configuration: unaffected (according to the CVE record)
- Required privilege: Subscriber account
Fixed in
Unknown. No fixed version or vendor advisory was found.
Workaround
- No vendor workaround found.
- Restrict or disable open subscriber registration if the marketplace does not require it.
- Block PHP execution in upload directories such as wp-content/uploads.
- Review recent uploads for unexpected files and review subscriber accounts for anything unusual.
Exploitation
- Not listed as known exploited (KEV).
- No public proof of concept found.
- CISA SSVC: exploitation none, not automatable, total technical impact.
- Patchstack expects exploitation and notes that similar flaws are used in mass-exploit campaigns.
Our recommendation
- Check whether any installed Taskbot version is 6.6 or lower.
- If affected, contact AmentoTech or the developer for the current release, or disable the plugin until a fix is verified.
- Restrict subscriber registration and monitor uploads and new accounts.
- Obtain the Patchstack advisory to confirm the vulnerability class and the fixed version.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack: Taskbot WordPress plugin <= 6.6 Arbitrary File Upload patchstack.com
- HOL Guard: CVE-2026-39757 Taskbot hol.org
- CodeCanyon: Taskbot - A Freelancer Marketplace WordPress Plugin codecanyon.net
- Pluginizer: Taskbot Freelance and Jobs Marketplace pluginizer.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 15:38.
Original description (NVD)
Subscriber Arbitrary File Upload in Taskbot <= 6.6 versions.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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