LORIS has potential cross-site scripting in help_editor module

Description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From to before 27.0.3 and 28.0.1, the help_editor module of LORIS did not properly sanitize some user supplied variables which could result in a reflected cross-site scripting attack if a user is tricked into following an invalid link. The same input vector could also allow an attacker to download arbitrary markdown files on an unpatched server. This vulnerability is fixed in 27.0.3 and 28.0.1.

Scores

EPSS (exploitation in 30 days)

0.16% · top 95% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs
• CWE-552: Files or Directories Accessible to External Parties (opens in a new tab)All about CWE-552 and its CVEs

Affected products

• aces · Loris

  • affected >= , < 27.0.3
  • affected >= 28.0.0, < 28.0.1

References (1)

• https://github.com/aces/Loris/security/advisories/GHSA-j2p3-58m2-v6q3 (opens in a new tab)x_refsource_CONFIRM

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-35169](https://trackcve.app/badge/CVE-2026-35169.svg)](https://trackcve.app/cve/CVE-2026-35169)

Record last updated 9 Apr 2026, 14:21 UTC.