CVE-2025-34305: IPFire versions prior to 2.29 (Core Update 198) contain multiple stored cross-site scripting (XSS) vulnerabili

Q: How do I fix CVE-2025-34305?

ipfire: upgrade to 2.29. Exact commands for each OS are on this page.

Q: Is CVE-2025-34305 being exploited?

CVE-2025-34305 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-34305 affect?

CVE-2025-34305 affects ipfire. Severity is medium (CVSS 5.4). IPFire versions prior to 2.29 (Core Update 198) contain multiple stored cross-site scripting (XSS) vulnerabilities caused by a bug in the cleanhtml() function (/var/ipfire/header.pl) that fails to apply HTML-entity encoding to user input. W

Q: How urgent is CVE-2025-34305?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2025-34305 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 versions prior to 2.29 (Core Update 198) contain multiple stored cross-site scripting (XSS) vulnerabilities caused by a bug in the cleanhtml() function (/var/ipfire/header.pl) that fails to apply HTML-entity encoding to user input. When an authenticated user submits data to affected endpoints - for example, POST /cgi-bin/wakeonlan.cgi (CLIENT_COMMENT), /cgi-bin/dhcp.cgi (ADVOPT_DATA, FIX_REMARK, FIX_FILENAME, FIX_ROOTPATH), /cgi-bin/connsc

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-10-28
Last modified	2026-10-19

Publisher (CNA): VulnCheck · Vendor: ipfire

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-28 15:16 UTCPublished CVE record published
2026-10-19 13:10 UTCUpdated Record last modified

ipfire ipfire UPGRADE

Affected: < 2.29 · 2.29 core_update183 · 2.29 core_update184 · 2.29 core_update185 · 2.29 core_update186 · 2.29 core_update187 · 2.29 core_update188 · 2.29 core_update189

Fixed in: 2.29

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.29 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ipfire

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ipfire

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2025-34305?

ipfire: upgrade to 2.29. Exact commands for each OS are on this page.

Is CVE-2025-34305 being exploited?

CVE-2025-34305 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-2025-34305 affect?

CVE-2025-34305 affects ipfire. Severity is medium (CVSS 5.4). IPFire versions prior to 2.29 (Core Update 198) contain multiple stored cross-site scripting (XSS) vulnerabilities caused by a bug in the cleanhtml() function (/var/ipfire/header.pl) that fails to apply HTML-entity encoding to user input. W

How urgent is CVE-2025-34305?

Priority 29/100. No elevated risk signals yet.

Related CVEs

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CVE-2025-34304 MEDIUM 6.5 UPGRADE IPFire versions prior to 2.29 (Core Update 198) contain a SQL injection vulnerability that allows an authentic
CVE-2025-34302 MEDIUM 5.4 UPGRADE IPFire versions prior to 2.29 (Core Update 198) contain a stored cross-site scripting (XSS) vulnerability that
CVE-2025-34303 MEDIUM 5.4 UPGRADE IPFire versions prior to 2.29 (Core Update 198) contain a stored cross-site scripting (XSS) vulnerability that

References

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