How severe is CVE-2026-4355?

CVE-2026-4355 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-4355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4355?

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

Does CVE-2026-4355 have an EU (EUVD) identifier?

Yes. CVE-2026-4355 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12686.

When was CVE-2026-4355 published?

CVE-2026-4355 was published on 2026-03-18 and last updated on 2026-06-17.

CVE-2026-4355

CVE-2026-4355 is a low-severity vulnerability with a CVSS 3.x base score of 3.5. 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: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
CVSS v4: 2.0
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12686
Weakness: CWE-79
Published: 2026-03-18
Last modified: 2026-06-17

Description

A vulnerability was detected in Portabilis i-Educar 2.11. This impacts an unknown function of the file /intranet/educar_servidor_curso_lst.php of the component Endpoint. Performing a manipulation of the argument Name results in cross site scripting. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2026-4355?: A vulnerability was detected in Portabilis i-Educar 2.11. This impacts an unknown function of the file /intranet/educar_servidor_curso_lst.php of the component Endpoint. Performing a manipulation of the argument Name results in cross site scripting. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2026-4355?: CVE-2026-4355 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-4355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4355?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4355 have an EU (EUVD) identifier?: Yes. CVE-2026-4355 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12686.
When was CVE-2026-4355 published?: CVE-2026-4355 was published on 2026-03-18 and last updated on 2026-06-17.

References

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