LORIS has an open redirect field on login

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Summary

CVECVE-2026-39985
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-09 18:17:02 UTC
Updated2026-04-22 00:24:34 UTC
DescriptionLORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. Prior to 27.0.3 and 28.0.1, the redirect parameter upon login to LORIS was not validating the value of the redirect as being within LORIS, which could be used to trick users into visiting arbitrary URLs if they are given a link with a third party redirect parameter. This vulnerability is fixed in 27.0.3 and 28.0.1.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.000340000 probability, percentile 0.099720000 (date 2026-04-22)

Problem Types: CWE-601 | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mcgill Loris All All All All
Application Mcgill Loris 28.0.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Aces Loris affected < 27.0.3 Not specified
CNA Aces Loris affected >= 28.0.0, < 28.0.1 Not specified

References

ReferenceSourceLinkTags
github.com/aces/Loris/commit/f57f54b42a076bf53ba86e20d4dbf37f63538f58 [email protected] github.com Patch
github.com/aces/Loris/releases/tag/v27.0.3 [email protected] github.com Release Notes
github.com/aces/Loris/releases/tag/v28.0.1 [email protected] github.com Release Notes
github.com/aces/Loris/security/advisories/GHSA-rch2-f5fw-cg95 [email protected] github.com Vendor Advisory
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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