CVE-2026-55147

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 63/100
Published: 2026-10-30 Modified: 2026-11-02 First seen: 2026-10-30 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: Low
I: Low
A: Low

Description

LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. In versions from 22.0.0 prior to 27.0.4 and from 28.0.0 prior to 28.0.2, the `API` for the `imaging_browser` module permits edits to imaging data without checking the frontend permissions that restrict editing in Imaging Browser. An authenticated `API` caller can therefore modify imaging data without the required edit authorization. Deployments that no longer use the `API` can disable it to remove access to this endpoint. This issue is fixed in versions 27.0.4 and 28.0.2.

Affected Software (4)

VendorProductVersion
aces Loris >= 22.0.0, < 27.0.4
aces Loris >= 28.0.0, < 28.0.2
aces Loris >= 22.0.0, < 27.0.4
aces Loris >= 28.0.0, < 28.0.2

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

6.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploitation Probability

0.21%
Raw Score 0.002150
Percentile 12.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00215
2026-11-12
0.00215
2026-11-10
0.00215
2026-11-09
0.00215
2026-11-08
0.00215
2026-11-07
0.00215
2026-11-06
0.00215
2026-11-05
0.00215
2026-11-04
0.00215
2026-11-03
0.00215
2026-11-02
0.00215
2026-11-01
0.00215
2026-10-31
0.00215

Intelligence Sources

mitre ref →
nvd ref →