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Description

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 administrator browsers.

PUBLISHED Reserved 2026-02-18 | Published 2026-02-18 | Updated 2026-02-19 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

IPFire 2.21 - Core Update 127
affected

Credits

Ozer Goker finder

References

www.exploit-db.com/exploits/46344 (ExploitDB-46344) exploit

www.ipfire.org (IPFire Official Website) product

downloads.ipfire.org/.../ipfire-2.21.x86_64-full-core127.iso (IPFire 2.21 Core Update 127 Download) patch

www.vulncheck.com/...-update-cross-site-scripting-via-ovpnma (VulnCheck Advisory: IPFire 2.21 Core Update 127 Cross-Site Scripting via ovpnmain.cgi) third-party-advisory

cve.org (CVE-2019-25398)

nvd.nist.gov (CVE-2019-25398)

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