How severe is CVE-2021-23407?

CVE-2021-23407 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-23407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23407?

CVE-2021-23407 affects Elfinder.net.core Project Elfinder.net.core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23407?

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

When was CVE-2021-23407 published?

CVE-2021-23407 was published on 2021-07-14 and last updated on 2026-06-17.

CVE-2021-23407

CVE-2021-23407 is a high-severity vulnerability in Elfinder.net.core Project Elfinder.net.core with a CVSS 3.x base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Elfinder.net.core Project Elfinder.net.core
Published: 2021-07-14
Last modified: 2026-06-17

Description

This affects the package elFinder.Net.Core from 0 and before 1.2.4. The user-controlled file name is not properly sanitized before it is used to create a file system path.

Frequently asked questions

What is CVE-2021-23407?: This affects the package elFinder.Net.Core from 0 and before 1.2.4. The user-controlled file name is not properly sanitized before it is used to create a file system path.
How severe is CVE-2021-23407?: CVE-2021-23407 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-23407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23407?: CVE-2021-23407 affects Elfinder.net.core Project Elfinder.net.core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23407?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-23407 published?: CVE-2021-23407 was published on 2021-07-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:elfinder.net.core_project:elfinder.net.core:*:*:*:*:*:*:*:*

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