CVE-2021-25299

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

97.76% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.9% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-09.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-02-15 12:32Z5 YR AGO

Last updated

2026-07-09 00:12Z1 MO AGO

Reserved

2021-01-18

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.2

Document digest

21c5c72c3d1afdc23592e6adaa338e7d2a7c1dbf3f07e8a492dfb1d7f7a17505

• assets.nagios.comhttps://assets.nagios.com/downloads/nagiosxi/versions.php
• github.comhttps://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md
• packetstormsecurity.comhttp://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html