How severe is CVE-2018-9109?

CVE-2018-9109 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2018-9109 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9109?

CVE-2018-9109 affects Std42 Elfinder. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9109?

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.

When was CVE-2018-9109 published?

CVE-2018-9109 was published on 2018-03-28 and last updated on 2026-06-17.

CVE-2018-9109

CVE-2018-9109 is a critical-severity vulnerability in Std42 Elfinder 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Std42 Elfinder
Published: 2018-03-28
Last modified: 2026-06-17

Description

Studio 42 elFinder before 2.1.36 has a directory traversal vulnerability in elFinder.class.php with the zipdl() function that can allow a remote attacker to download files accessible by the web server process and delete files owned by the account running the web server process.

Frequently asked questions

What is CVE-2018-9109?: Studio 42 elFinder before 2.1.36 has a directory traversal vulnerability in elFinder.class.php with the zipdl() function that can allow a remote attacker to download files accessible by the web server process and delete files owned by the account running the web server process.
How severe is CVE-2018-9109?: CVE-2018-9109 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2018-9109 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9109?: CVE-2018-9109 affects Std42 Elfinder. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9109?: 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.
When was CVE-2018-9109 published?: CVE-2018-9109 was published on 2018-03-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:std42:elfinder:*:*:*:*:*:*:*:*

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