CVE-2019-25398: IPFire 2.21 Core Update 127 contains multiple cross-site scripting vulnerabilities in the ovpnmain.cgi script

Routine

MEDIUM 6.1DOWNGRADE

CVE-2019-25398 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 cross-site scripting vulnerabilities in the ovpnmain.cgi script that allow attackers to inject malicious scripts through VPN configuration parameters. Attackers can submit POST requests with script payloads in parameters like VPN_IP, DMTU, ccdname, ccdsubnet, DOVPN_SUBNET, DHCP_DOMAIN, DHCP_DNS, DHCP_WINS, ROUTES_PUSH, FRAGMENT, KEEPALIVE_1, and KEEPALIVE_2 to execute arbitrary JavaScript in administr

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-2019-25398?

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

Is CVE-2019-25398 being exploited?

CVE-2019-25398 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-2019-25398 affect?

CVE-2019-25398 affects ipfire. Severity is medium (CVSS 6.1). IPFire 2.21 Core Update 127 contains multiple cross-site scripting vulnerabilities in the ovpnmain.cgi script that allow attackers to inject malicious scripts through VPN configuration parameters. Attackers can submit POST requests with scr

How urgent is CVE-2019-25398?

Priority 32/100. Public exploit reference

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References

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