How severe is CVE-2024-26503?

CVE-2024-26503 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-26503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-26503?

CVE-2024-26503 affects Openeclass. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-26503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-26503 have an EU (EUVD) identifier?

Yes. CVE-2024-26503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-23768.

When was CVE-2024-26503 published?

CVE-2024-26503 was published on 2024-03-14 and last updated on 2026-06-17.

CVE-2024-26503

CVE-2024-26503 is a critical-severity vulnerability in Openeclass with a CVSS 3.x base score of 9.1. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-23768
Weakness: CWE-434
Affected product: Openeclass
Published: 2024-03-14
Last modified: 2026-06-17

Description

Unrestricted File Upload vulnerability in Greek Universities Network Open eClass v.3.15 and earlier allows attackers to run arbitrary code via upload of crafted file to certbadge.php endpoint.

Frequently asked questions

What is CVE-2024-26503?: Unrestricted File Upload vulnerability in Greek Universities Network Open eClass v.3.15 and earlier allows attackers to run arbitrary code via upload of crafted file to certbadge.php endpoint.
How severe is CVE-2024-26503?: CVE-2024-26503 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-26503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-26503?: CVE-2024-26503 affects Openeclass. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-26503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-26503 have an EU (EUVD) identifier?: Yes. CVE-2024-26503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-23768.
When was CVE-2024-26503 published?: CVE-2024-26503 was published on 2024-03-14 and last updated on 2026-06-17.

References

https://www.less-secure.com/2024/03/open-eclass-cve-2024-26503-unrestricted.html

Affected products (1)

cpe:2.3:a:openeclass:openeclass:*:*:*:*:*:*:*:*

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