CVE-2026-35403 - LORIS has potential cross-site scripting in survey_accounts module

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MEDIUM

LORIS has potential cross-site scripting in survey_accounts module

Published Apr 8, 2026

6.5

MEDIUM

CVSS 3.1

EPSS 0.22%

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.

Affected products

Vendor Aces Product Loris Default
n/a
- Version
  >= 15.10, < 27.0.3
  Status
  affected
  Constraints
  -
- Version
  >= 28.0.0, < 28.0.1
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Aces

Loris

n/a

Version	Status	Constraints
>= 15.10, < 27.0.3	affected	-
>= 28.0.0, < 28.0.1	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-79

Cross-site Scripting (XSS)

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-20578
Advisory
https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p
x_refsource_CONFIRMPatchVendor Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-20578		Advisory
https://github.com/aces/Loris/security/advisories/GHSA-776p-5pwh-vc8p		x_refsource_CONFIRMPatchVendor Advisory