What’s Vulnerable › Vulnerabilities

CVE-2021-35489

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-09 · updated 2026-06-17
• Weakness: CWE-79

Description

Thruk 2.40-2 allows /thruk/#cgi-bin/extinfo.cgi?type=2&host={HOSTNAME]&service={SERVICENAME]&backend={BACKEND] Reflected XSS via the host or service parameter. An attacker could inject arbitrary JavaScript into extinfo.cgi. The malicious payload would be triggered every time an authenticated user browses the page containing it.

Affected products

• sni Thruk: 2.40-2

References

• https://www.gruppotim.it/redteam
• https://www.thruk.org/changelog.html
• https://www.gruppotim.it/redteam
• https://www.thruk.org/changelog.html

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