What is CVE-2026-53992?

CVE-2026-53992 is a medium-severity vulnerability in Projectsend, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-05.

How severe is CVE-2026-53992?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Projectsend

CVE-2026-53992

ProjectSend r2029 contains a reflected cross-site scripting vulnerability in thumbnails-regenerate.php that allows remote attackers to inject arbitrary HTML and JavaScript by supplying unsanitized values in the start_date and end_date GET parameters, which are echoed unescaped into HTML attribute values. Attackers can craft a malicious URL that, when followed by an authenticated victim with edit_settings permissions, executes injected scripts in the application origin to steal session cookies or perform unauthorized actions including user management, file management, and application settings changes.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Projectsend — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-53992?: CVE-2026-53992 is a medium-severity vulnerability in Projectsend, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-05.
How severe is CVE-2026-53992?: Medium severity. CVSS v3 base score is 6.1 out of 10.