How severe is CVE-2025-34303?

CVE-2025-34303 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-34303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34303?

CVE-2025-34303 primarily affects Ipfire. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-34303?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-34303 have an EU (EUVD) identifier?

Yes. CVE-2025-34303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36525.

When was CVE-2025-34303 published?

CVE-2025-34303 was published on 2025-10-28 and last updated on 2026-06-17.

CVE-2025-34303

CVE-2025-34303 is a medium-severity vulnerability in Ipfire with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36525
Weakness: CWE-79
Affected product: Ipfire
Published: 2025-10-28
Last modified: 2026-06-17

Description

IPFire versions prior to 2.29 (Core Update 198) contain a stored cross-site scripting (XSS) vulnerability that allows an authenticated attacker to inject arbitrary JavaScript code through the IGNORE_ENTRY_REMARK parameter when adding a whitelisted host. When a whitelisted host is added, an HTTP POST request is sent to the Request-URI /cgi-bin/ids.cgi and the remark for the entry is provided in the IGNORE_ENTRY_REMARK parameter. The value of this parameter is stored and later rendered in the web interface without proper sanitization or encoding, allowing injected scripts to execute in the context of other users who view the affected whitelist entry.

Frequently asked questions

What is CVE-2025-34303?: IPFire versions prior to 2.29 (Core Update 198) contain a stored cross-site scripting (XSS) vulnerability that allows an authenticated attacker to inject arbitrary JavaScript code through the IGNORE_ENTRY_REMARK parameter when adding a whitelisted host. When a whitelisted host is added, an HTTP POST request is sent to the Request-URI /cgi-bin/ids.cgi and the remark for the entry is provided in the IGNORE_ENTRY_REMARK parameter. The value of this parameter is stored and later rendered in the web interface without proper sanitization or encoding, allowing injected scripts to execute in the context of other users who view the affected whitelist entry.
How severe is CVE-2025-34303?: CVE-2025-34303 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-34303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34303?: CVE-2025-34303 primarily affects Ipfire. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-34303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-34303 have an EU (EUVD) identifier?: Yes. CVE-2025-34303 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36525.
When was CVE-2025-34303 published?: CVE-2025-34303 was published on 2025-10-28 and last updated on 2026-06-17.

References

Affected products (16)

cpe:2.3:a:ipfire:ipfire:*:*:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update183:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update184:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update185:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update186:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update187:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update188:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update189:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update190:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update191:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update192:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update193:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update194:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update195:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update196:*:*:*:*:*:*
cpe:2.3:a:ipfire:ipfire:2.29:core_update197:*:*:*:*:*:*

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