CVE-2021-26794

Name: CVE-2021-26794
Creator: NVD / NIST
Published: 2021-09-23T17:15:11.96+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.55%

Last modified Jun 17, 2026

CVE-2021-26794 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Privilege escalation in 'upload.php' in FrogCMS SentCMS v0.9.5 allows attacker to execute arbitrary code via crafted php file.. EPSS estimates a 1.55% chance of exploitation in the next 30 days.

Description

Privilege escalation in 'upload.php' in FrogCMS SentCMS v0.9.5 allows attacker to execute arbitrary code via crafted php file.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.55%

72.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Frogcms Project	Frogcms	0.9.5

References

https://github.com/philippe/FrogCMS/issues/11Exploit, Issue Tracking, Third Party Advisory
https://github.com/philippe/FrogCMS/issues/11Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Sep 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26794?

Privilege escalation in 'upload.php' in FrogCMS SentCMS v0.9.5 allows attacker to execute arbitrary code via crafted php file.

How severe is CVE-2021-26794?

CVE-2021-26794 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26794?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26794?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST