CVE-2021-40887

9.8 CRITICAL

Projectsend version r1295 is affected by a directory traversal vulnerability

Published: 2021-10-11 · Last updated: 2026-06-17

Severity and scoring

CVSS: 9.8 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-22

Affected products

Vendor	Product
projectsend	projectsend

Description

Projectsend version r1295 is affected by a directory traversal vulnerability. Because of lacking sanitization input for files[] parameter, an attacker can add ../ to move all PHP files or any file on the system that has permissions to /upload/files/ folder.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-40887
[Exploit reference]https://github.com/projectsend/projectsend/issues/994
[Exploit reference]https://github.com/projectsend/projectsend/issues/994

Related CVEs

Same vendor

CVE-2021-40888 — Projectsend version r1295 is affected by Cross Site Scripting (XSS) due to lack of sanitization when echo output data in returnFilesIds()... (5.4 MEDIUM)
CVE-2021-40886 — Projectsend version r1295 is affected by a directory traversal vulnerability (6.5 MEDIUM)
CVE-2021-40884 — Projectsend version r1295 is affected by sensitive information disclosure (8.1 HIGH)

Same CWE

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CVE-2026-8442 — The WP Review Slider Pro plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to and including 12.6.8 (8.1 HIGH)
CVE-2026-49766 — Subscriber Arbitrary File Deletion in WP User Manager <= 2.9.16 versions (9.9 CRITICAL)
CVE-2026-49061 — Unauthenticated Arbitrary File Download in WPC Product Options for WooCommerce <= 3.2.1 versions (7.5 HIGH)
CVE-2026-40779 — Contributor Arbitrary File Deletion in Link Library <= 7.8.8 versions (7.7 HIGH)