RCE in Impresscms
CVE-2021-47938
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Impresscms — versions 1.4.2
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50298 (exploit)
- www.impresscms.org/ (product)
- www.impresscms.org/modules/downloads/ (product)
- www.vulncheck.com/advisories/impresscms-remote-code-execution-via-autotasks (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47938?
- CVE-2021-47938 is a high-severity vulnerability in Impresscms, classified under Code Injection. CVSS score: 8.8/10. Published 2026-05-10.
- How severe is CVE-2021-47938?
- High severity. CVSS v3 base score is 8.8 out of 10.