CVE-2019-25397: IPFire 2.21 Core Update 127 contains multiple reflected cross-site scripting vulnerabilities in the hosts.cgi

Routine

MEDIUM 6.1DOWNGRADE

CVE-2019-25397 is a medium-severity flaw (CVSS 6.1) 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 hosts.cgi script that allow attackers to inject malicious scripts through unvalidated parameters. Attackers can submit POST requests with script payloads in the KEY1, IP, HOST, or DOM parameters to execute arbitrary JavaScript in users' browsers.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
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-2019-25397?

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

Is CVE-2019-25397 being exploited?

CVE-2019-25397 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-2019-25397 affect?

CVE-2019-25397 affects ipfire. Severity is medium (CVSS 6.1). IPFire 2.21 Core Update 127 contains multiple reflected cross-site scripting vulnerabilities in the hosts.cgi script that allow attackers to inject malicious scripts through unvalidated parameters. Attackers can submit POST requests with sc

How urgent is CVE-2019-25397?

Priority 32/100. Public exploit reference

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References

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