How severe is CVE-2023-53980?

CVE-2023-53980 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-2023-53980 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53980?

CVE-2023-53980 affects Projectsend. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-53980?

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-2023-53980 have an EU (EUVD) identifier?

Yes. CVE-2023-53980 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-60242.

When was CVE-2023-53980 published?

CVE-2023-53980 was published on 2025-12-22 and last updated on 2026-06-17.

CVE-2023-53980

CVE-2023-53980 is a critical-severity vulnerability in Projectsend 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: 8.7
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-60242
Weakness: CWE-434
Affected product: Projectsend
Published: 2025-12-22
Last modified: 2026-06-17

Description

ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute arbitrary commands on the server.

Frequently asked questions

What is CVE-2023-53980?: ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute arbitrary commands on the server.
How severe is CVE-2023-53980?: CVE-2023-53980 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-2023-53980 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53980?: CVE-2023-53980 affects Projectsend. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-53980?: 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-2023-53980 have an EU (EUVD) identifier?: Yes. CVE-2023-53980 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-60242.
When was CVE-2023-53980 published?: CVE-2023-53980 was published on 2025-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:projectsend:projectsend:r1605:*:*:*:*:*:*:*

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CVE-2016-10733 — Critical (CVSS 9.8): ProjectSend (formerly cFTP) r582 allows directory traversal via file=../ in the process-zip-download.php query string.
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CVE-2016-10731 — Critical (CVSS 9.8): ProjectSend (formerly cFTP) r582 allows SQL injection via manage-files.php with the request parameter status,…

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