XSS in Thruk
CVE-2021-35489
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (58.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Thruk — versions 2.40-2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.gruppotim.it/redteam (Exploit, Third Party Advisory)
- www.thruk.org/changelog.html (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-35489?
- CVE-2021-35489 is a medium-severity vulnerability in Thruk, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-11-09.
- How severe is CVE-2021-35489?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-35489 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.