How severe is CVE-2023-53871?

CVE-2023-53871 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2023-53871 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53871?

CVE-2023-53871 affects Soosyze. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-53871?

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-2023-53871 have an EU (EUVD) identifier?

Yes. CVE-2023-53871 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203433.

When was CVE-2023-53871 published?

CVE-2023-53871 was published on 2025-12-15 and last updated on 2026-06-17.

CVE-2023-53871

CVE-2023-53871 is a critical-severity vulnerability in Soosyze with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v4: 6.9
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203433
Weakness: CWE-434
Affected product: Soosyze
Published: 2025-12-15
Last modified: 2026-06-17

Description

Soosyze 2.0.0 contains a file upload vulnerability that allows attackers to upload arbitrary HTML files with embedded PHP code to the application. Attackers can exploit the broken file upload mechanism to potentially view sensitive file paths and execute malicious PHP scripts on the server.

Frequently asked questions

What is CVE-2023-53871?: Soosyze 2.0.0 contains a file upload vulnerability that allows attackers to upload arbitrary HTML files with embedded PHP code to the application. Attackers can exploit the broken file upload mechanism to potentially view sensitive file paths and execute malicious PHP scripts on the server.
How severe is CVE-2023-53871?: CVE-2023-53871 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2023-53871 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53871?: CVE-2023-53871 affects Soosyze. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-53871?: 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-2023-53871 have an EU (EUVD) identifier?: Yes. CVE-2023-53871 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203433.
When was CVE-2023-53871 published?: CVE-2023-53871 was published on 2025-12-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:soosyze:soosyze:2.0.0:*:*:*:*:*:*:*

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