SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-26804

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.

MEDIUM 6.5EPSS 1.19%

Does this matter?

Lower severity and a low EPSS score (1.19%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1
6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS
1.19% probability · 68th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-276
Affected
centreon/centreon web
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 1.19%26 October 202626 October 2026

EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.