Description
Nagios Core 4.4.2 has XSS via the alert summary reports of plugin results, as demonstrated by a SCRIPT element delivered by a modified check_load plugin to NRPE.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nagios4 | 4.3.4-3 | — |
| Debian 13 | nagios4 | 4.3.4-3 | — |
| Debian 12 | nagios4 | 4.3.4-3 | — |
| Debian 8 | nagios3 | 3.5.1.dfsg-2+deb8u1 | DLA-1615-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | nagios3 | No fix yet | — |
| Ubuntu 16.04 LTS | nagios3 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | nagios | 4.4.5-bp151.4.3.1 | openSUSE-SU-2020:0517-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nagios | 4.4.6-2.5 | openSUSE-SU-2024:11073-1 |
| openSUSE Leap 15.1 | nagios | 4.4.5-lp151.5.4.1 | openSUSE-SU-2020:0500-1 |
Advisories 4
- DLA-1615-1 nagios3 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:0500-1 Security update for nagios SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0517-1 Security update for nagios SUSE / openSUSE Security Updates · May 7, 2025
- openSUSE-SU-2024:11073-1 nagios-4.4.6-2.5 on GA media SUSE / openSUSE Security Updates · May 7, 2025