CVE-2023-3971

MEDIUM 1 PoC
MEDIUM Priority: 0.04 BB Relevance: 61/100
Published: 2023-10-04 Modified: 2026-11-07 First seen: 2026-11-07 Status: active

Attack Surface

Network Low Complexity Scope Change

CVSS Vector Breakdown

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

Description

An HTML injection flaw was found in Controller in the user interface settings. This flaw allows an attacker to capture credentials by creating a custom login page by injecting HTML, resulting in a complete compromise.

References & Advisories (4)

https://access.redhat.com/errata/RHSA-2023:4340
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:4590
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2226965
issue-tracking x_refsource_REDHAT

Proof of Concept (1)

Bug Bounty Relevance

61 / 100
✓ Network accessible
✓ Low complexity
✓ PoC available (1)

CVSS Score

5.4 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

0.82%
Raw Score 0.008160
Percentile 57.3%
Date 2026-11-08

EPSS Trend

2026-11-08
0.00816
2026-11-07
0.00816
2026-11-06
0.00816

Intelligence Sources

mitre ref →
nvd ref →