PT-2021-16508 · Nagios Xi · Nagios Xi

Published 2021-02-13 · Updated 2021-03-04 · CVE-2021-25299

Positive Technologies (AI Summary)

CVSS v2.0

6.4

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Name of the Vulnerable Software and Affected Versions: Nagios XI version xi-5.7.5

Description: The issue exists due to improper sanitization of user-controlled input in the file /usr/local/nagiosxi/html/admin/sshterm.php. This can be exploited by a maliciously crafted URL, which when clicked by an admin user, can steal session cookies or be chained with previous bugs to achieve one-click remote command execution (RCE) on the Nagios XI server.

Recommendations: For Nagios XI version xi-5.7.5, consider disabling access to the /usr/local/nagiosxi/html/admin/sshterm.php file until a patch is available to prevent potential exploitation. Restricting user input to prevent malicious URLs from being clicked is also advisable. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2025-01884

CVE-2021-25299

Affected Products

Nagios Xi

References · 10

• 🔥 https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md · Exploit
• 🔥 http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html · Exploit
• https://bdu.fstec.ru/vul/2025-01884 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-25299 · Security Note
• https://osv.dev/vulnerability/CVE-2021-25299 · Vendor Advisory
• https://t.me/cibsecurity/23592 · Telegram Post
• http://nagios.com · Note
• https://packetstorm.news/files/id/161561 · Note
• https://assets.nagios.com/downloads/nagiosxi/versions.php · Note
• https://t.me/cvenotify/9954 · Telegram Post