Auth bypass in Projectsend
CVE-2026-3977
A security vulnerability has been detected in projectsend up to r1945. The affected element is an unknown function of the component AJAX Endpoints. The manipulation leads to missing authorization. The attack can be initiated remotely. The identifier of the patch is 35dfd6f08f7d517709c77ee73e57367141107e6b. To fix this issue, it is recommended to deploy a patch.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Projectsend — versions r1945
Weakness classification (CWE)
References
- vuldb.com/ (vdb-entry)
- vuldb.com/ (signature, permissions-required)
- github.com/projectsend/projectsend/issues/1525 (issue-tracking)
- github.com/projectsend/projectsend/issues/1525 (issue-tracking)
- github.com/projectsend/projectsend/commit/35dfd6f08f7d517709c77ee73e57367141107… (patch)
- github.com/projectsend/projectsend/ (product)
Frequently asked questions
- What is CVE-2026-3977?
- CVE-2026-3977 is a medium-severity vulnerability in Projectsend, classified under Missing Authorization. CVSS score: 6.3/10. Published 2026-03-12.
- How severe is CVE-2026-3977?
- Medium severity. CVSS v3 base score is 6.3 out of 10.