CVE-2021-26804

Name: CVE-2021-26804
Creator: NVD / NIST
Published: 2021-05-04T17:15:07.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.19%

Last modified Jun 17, 2026

CVE-2021-26804 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Insecure Permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allows remote attackers to bypass validation by changing any file extension to ".gif", then uploading it in the "Administration/ Parameters/ Images" section of the application.. EPSS estimates a 1.19% chance of exploitation in the next 30 days.

Description

Insecure Permissions in Centreon Web versions 19.10.18, 20.04.8, and 20.10.2 allows remote attackers to bypass validation by changing any file extension to ".gif", then uploading it in the "Administration/ Parameters/ Images" section of the application.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.19%

64.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-276

Affected Software

Vendor	Product	Versions
Centreon	Centreon Web	19.10.18
Centreon	Centreon Web	20.04.8
Centreon	Centreon Web	20.10.2

References

Timeline

Published: May 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26804?

How severe is CVE-2021-26804?

CVE-2021-26804 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26804?

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-2021-26804?

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

Scan your code now

Source: NVD / NIST