Auth bypass in Projectsend
CVE-2023-53930
ProjectSend r1605 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to download private files by manipulating the download ID parameter. Attackers can access any user's private files by changing the 'id' parameter in the download request to process.php.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Projectsend — versions r1605
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51400 (Exploit, Third Party Advisory, exploit)
- www.projectsend.org/ (Product, product)
- www.vulncheck.com/advisories/projectsend-insecure-direct-object-reference-file-… (Exploit, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53930?
- CVE-2023-53930 is a high-severity vulnerability in Projectsend, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.5/10. Published 2025-12-17.
- How severe is CVE-2023-53930?
- High severity. CVSS v3 base score is 7.5 out of 10.