CVE-2021-47938

HIGH

ImpressCMS 1.4.2 Remote Code Execution via Autotasks

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47938. PoCs published by Halit AKAYDIN.

AI-analyzed exploit summary This exploit leverages an authenticated RCE vulnerability in ImpressCMS 1.4.2 by abusing the autotasks feature to write a malicious PHP file (evil.php) to the server, which then allows arbitrary command execution via HTTP requests.

Description

ImpressCMS 1.4.2 contains a remote code execution vulnerability in the autotasks administrative interface that allows authenticated attackers to execute arbitrary PHP code by injecting malicious code into the sat_code parameter. Attackers can authenticate, submit a POST request to /modules/system/admin.php?fct=autotasks&op=mod with crafted sat_code containing PHP commands, which creates an executable file that accepts arbitrary commands via GET parameters.

Exploits (1)

exploitdb WORKING POC
by Halit AKAYDIN · pythonwebappsphp
https://www.exploit-db.com/exploits/50298

This exploit leverages an authenticated RCE vulnerability in ImpressCMS 1.4.2 by abusing the autotasks feature to write a malicious PHP file (evil.php) to the server, which then allows arbitrary command execution via HTTP requests.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: ImpressCMS 1.4.2
Auth required
Prerequisites: valid admin credentials · access to the autotasks admin panel
devstral-2 · analyzed May 10, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-50298
https://www.exploit-db.com/exploits/50298
Product product
Official Product Homepage
https://www.impresscms.org/
Product product
Product Reference
https://www.impresscms.org/modules/downloads/
Third Party Advisory third-party-advisory
VulnCheck Advisory: ImpressCMS 1.4.2 Remote Code Execution via Autotasks
https://www.vulncheck.com/advisories/impresscms-remote-code-execution-via-autotasks

Scores

CVSS v3 8.8
EPSS 0.0057
EPSS Percentile 42.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-94
Status published
Products (1)
Impresscms/ImpressCMS 1.4.2
Published May 10, 2026
Tracked Since May 10, 2026