CVE-2026-53992
Received Received - Intake

Reflected XSS in ProjectSend via Date Parameters

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: VulnCheck

Description
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.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-53992
EUVD
EUVD-2026-53394

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
projectsend projectsend r2029
projectsend projectsend to b4ad95b (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

CVE-2026-53992 is a reflected cross-site scripting (XSS) vulnerability in ProjectSend r2029. It exists in the thumbnails-regenerate.php file where the start_date and end_date GET parameters are echoed unescaped into HTML attribute values. Attackers can inject malicious scripts by crafting a URL with unsanitized parameters.

Detection Guidance

To detect this vulnerability, inspect the ProjectSend application for the file thumbnails-regenerate.php. Check if GET parameters start_date and end_date are echoed without proper escaping. Use browser developer tools to monitor network requests for unsanitized input handling.

Impact Analysis

If exploited, this vulnerability allows attackers to execute arbitrary HTML and JavaScript in the victim's browser. This can lead to session cookie theft, unauthorized actions like user or file management changes, and application settings modifications if the victim has edit_settings permissions.

Mitigation Strategies

Apply the patch from commit b4ad95b1bd3d18b23261b7c3496bfbac8ebfe324 which adds htmlspecialchars with ENT_QUOTES and UTF-8 encoding to sanitize start_date and end_date parameters. Alternatively, restrict access to edit_settings permissions or disable the thumbnails-regenerate.php functionality until patched.

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