How severe is CVE-2023-53942?

CVE-2023-53942 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-53942 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53942?

CVE-2023-53942 affects Leefish File Thingie. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-53942?

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.

Does CVE-2023-53942 have an EU (EUVD) identifier?

Yes. CVE-2023-53942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204359.

When was CVE-2023-53942 published?

CVE-2023-53942 was published on 2025-12-18 and last updated on 2026-06-17.

CVE-2023-53942

CVE-2023-53942 is a high-severity vulnerability in Leefish File Thingie with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v4: 9.4
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204359
Weakness: CWE-434
Affected product: Leefish File Thingie
Published: 2025-12-18
Last modified: 2026-06-17

Description

File Thingie 2.5.7 contains an authenticated file upload vulnerability that allows remote attackers to upload malicious PHP zip archives to the web server. Attackers can create a custom PHP payload, upload and unzip it, and then execute arbitrary system commands through a crafted PHP script with a command parameter.

Frequently asked questions

What is CVE-2023-53942?: File Thingie 2.5.7 contains an authenticated file upload vulnerability that allows remote attackers to upload malicious PHP zip archives to the web server. Attackers can create a custom PHP payload, upload and unzip it, and then execute arbitrary system commands through a crafted PHP script with a command parameter.
How severe is CVE-2023-53942?: CVE-2023-53942 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-53942 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53942?: CVE-2023-53942 affects Leefish File Thingie. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-53942?: 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.
Does CVE-2023-53942 have an EU (EUVD) identifier?: Yes. CVE-2023-53942 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204359.
When was CVE-2023-53942 published?: CVE-2023-53942 was published on 2025-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:leefish:file_thingie:2.5.7:*:*:*:*:*:*:*

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