# CVE-2021-47938: ImpressCMS remote code execution in autotasks administrative interface

Source: https://junglewise.ai/threats/cve-2021-47938-impresscms-remote-code-execution-in-autotasks-administrative  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-10. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2021-47938 · Severity: high · CVSS 8.8 · Published 2026-05-10

ImpressCMS, a content management system used for building websites, contains a security flaw in its administrative task scheduler. An attacker with valid login credentials can inject malicious code into the system's automated tasks. This allows them to take full control of the web server, potentially leading to the theft of sensitive data, website defacement, or a complete service shutdown.

Technologies: [Impresscms](https://junglewise.ai/threats/technologies/impresscms). Vendors: [Impresscms](https://junglewise.ai/threats/vendors/impresscms).

## Quick answers

**Is CVE-2021-47938 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-47938 being exploited in the wild.

**How severe is CVE-2021-47938?** High severity, with a CVSS score of 8.8, published 10 May 2026.

**Which products and versions are affected?** Impresscms 1.4.2.

**Is there a fix for CVE-2021-47938?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2021-47938 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2021-47938?** Check whether you run Impresscms at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A remote code execution (RCE) vulnerability exists in ImpressCMS 1.4.2 due to improper input validation in the 'autotasks' administrative component. An authenticated attacker can send a specially crafted POST request to /modules/system/admin.php?fct=autotasks&op=mod, injecting PHP code into the 'sat_code' parameter. This injection results in the creation of a new PHP file on the server that can be accessed remotely to execute arbitrary system commands via GET parameters. The vulnerability is classified as CWE-94 (Code Injection) and requires low-level authentication to exploit. Public exploit code is available.

## Affected products

- ImpressCMS ImpressCMS 1.4.2

## Timeline

- 2021-09-15: disclosed: Original exploit published on Exploit-DB
- 2026-05-10: advisory: NVD/VulnCheck advisory published

## References

- [https://www.exploit-db.com/exploits/50298](https://www.exploit-db.com/exploits/50298)
- [https://www.impresscms.org/](https://www.impresscms.org/)
- [https://www.impresscms.org/modules/downloads/](https://www.impresscms.org/modules/downloads/)
- [https://www.vulncheck.com/advisories/impresscms-remote-code-execution-via-autotasks](https://www.vulncheck.com/advisories/impresscms-remote-code-execution-via-autotasks)

## Related threats

- [ImpressCMS authenticated remote code execution in custom tags](https://junglewise.ai/threats/cve-2026-73679-impresscms-authenticated-remote-code-execution-in-custom-tags)
- [ImpressCMS SQL injection in admin.php bid parameter](https://junglewise.ai/threats/cve-2019-25703-impresscms-sql-injection-in-admin-php-bid-parameter)