CVE-2019-25400: IPFire 2.21 Core Update 127 contains multiple reflected cross-site scripting vulnerabilities in the fwhosts.cg

Routine

MEDIUM 5.4DOWNGRADE

CVE-2019-25400 is a medium-severity flaw (CVSS 5.4) affecting ipfire. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IPFire 2.21 Core Update 127 contains multiple reflected cross-site scripting vulnerabilities in the fwhosts.cgi script that allow attackers to inject malicious scripts through multiple parameters including HOSTNAME, IP, SUBNET, NETREMARK, HOSTREMARK, newhost, grp_name, remark, SRV_NAME, SRV_PORT, SRVGRP_NAME, SRVGRP_REMARK, and updatesrvgrp. Attackers can submit POST requests with script payloads in these parameters to execute arbitrary JavaScrip

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-18
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: ipfire

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-18 22:16 UTCPublished CVE record published
2026-06-17 02:32 UTCUpdated Record last modified

ipfire ipfire DOWNGRADE

Affected: 2.21 core_update127

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.21

1. Check installed version

apt-cache policy ipfire || rpm -q ipfire || ipfire --version

2. No fixed release: DOWNGRADE to a release before 2.21 (Debian / Ubuntu)

apt-cache madison ipfire sudo apt install ipfire=<VERSION_BEFORE_2.21> sudo apt-mark hold ipfire

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ipfire sudo dnf downgrade ipfire-<VERSION_BEFORE_2.21> sudo dnf versionlock add ipfire

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-25400?

ipfire: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-25400 being exploited?

CVE-2019-25400 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-25400 affect?

CVE-2019-25400 affects ipfire. Severity is medium (CVSS 5.4). IPFire 2.21 Core Update 127 contains multiple reflected cross-site scripting vulnerabilities in the fwhosts.cgi script that allow attackers to inject malicious scripts through multiple parameters including HOSTNAME, IP, SUBNET, NETREMARK, H

How urgent is CVE-2019-25400?

Priority 28/100. Public exploit reference

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References

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