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Fencer Intel
medium 5.4

CVE-2019-20139 json

In Nagios XI 5.6.9, XSS exists via the nocscreenapi.php host, hostgroup, or servicegroup parameter, or the schedulereport.php hour or frequ…

published 6y ago modified 4mo ago also EUVD-2019-10695

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
26.1%
EPSS 26.1% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

In Nagios XI 5.6.9, XSS exists via the nocscreenapi.php host, hostgroup, or servicegroup parameter, or the schedulereport.php hour or frequency parameter. Any authenticated user can attack the admin user.

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Exploit prediction

26.11% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • code610.blogspot.com https://code610.blogspot.com/2019/12/multiple-xss-bugs-in-nagios-569.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.