How severe is CVE-2019-25378?

CVE-2019-25378 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-25378 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-25378?

CVE-2019-25378 affects Smoothwall Smoothwall Express. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25378?

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

Does CVE-2019-25378 have an EU (EUVD) identifier?

Yes. CVE-2019-25378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19621.

When was CVE-2019-25378 published?

CVE-2019-25378 was published on 2026-02-16 and last updated on 2026-06-17.

CVE-2019-25378

CVE-2019-25378 is a medium-severity vulnerability in Smoothwall Smoothwall Express with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-19621
Weakness: CWE-79
Affected product: Smoothwall Smoothwall Express
Published: 2026-02-16
Last modified: 2026-06-17

Description

Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple cross-site scripting vulnerabilities in the proxy.cgi endpoint that allow attackers to inject malicious scripts through parameters including CACHE_SIZE, MAX_SIZE, MIN_SIZE, MAX_OUTGOING_SIZE, and MAX_INCOMING_SIZE. Attackers can submit POST requests with script payloads to store or reflect arbitrary JavaScript code that executes in users' browsers when the proxy configuration page is accessed.

Frequently asked questions

What is CVE-2019-25378?: Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple cross-site scripting vulnerabilities in the proxy.cgi endpoint that allow attackers to inject malicious scripts through parameters including CACHE_SIZE, MAX_SIZE, MIN_SIZE, MAX_OUTGOING_SIZE, and MAX_INCOMING_SIZE. Attackers can submit POST requests with script payloads to store or reflect arbitrary JavaScript code that executes in users' browsers when the proxy configuration page is accessed.
How severe is CVE-2019-25378?: CVE-2019-25378 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-25378 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25378?: CVE-2019-25378 affects Smoothwall Smoothwall Express. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25378?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2019-25378 have an EU (EUVD) identifier?: Yes. CVE-2019-25378 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19621.
When was CVE-2019-25378 published?: CVE-2019-25378 was published on 2026-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:smoothwall:smoothwall_express:3.1:sp4:*:*:-:*:*:*

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CVE-2019-25395 — High (CVSS 7.2): Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple stored cross-site scripting vulnerabilities in the…
CVE-2019-25394 — High (CVSS 7.2): Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains multiple stored cross-site scripting vulnerabilities in the…
CVE-2019-25379 — High (CVSS 7.2): Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains stored and reflected cross-site scripting vulnerabilities in…
CVE-2019-25393 — Medium (CVSS 6.1): Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains a reflected cross-site scripting vulnerability that allows…
CVE-2019-25392 — Medium (CVSS 6.1): Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains a reflected cross-site scripting vulnerability that allows…

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