CVE-2026-35403

LORIS has potential cross-site scripting in survey_accounts module

State: Published
Severity: 6.5 Medium
Published: Apr 8, 2026
Updated: Apr 10, 2026
Reserved: Apr 2, 2026

Description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 15.10 to before 27.0.3 and 28.0.1, there is a potential for a cross-site scripting attack in the survey_accounts module if a user provides an invalid visit label. While the data is properly JSON encoded, the Content-Type header is not set causing the web browser to interpret the payload as HTML, opening the possibility of a cross-site scripting if a user is tricked into following an invalid link. This vulnerability is fixed in 27.0.3 and 28.0.1.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Lorisaces	>= 15.10, < 27.0.3Affected >= 28.0.0, < 28.0.1Affected

References

https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p

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