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Fencer Vulns
critical 9.4

CVE-2024-48849 json

Authentication and Authorization Issues

published 2025-01-29 21 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-43246

cvss
9.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
1
Exploit-DB

Summary

Missing Origin Validation in WebSockets vulnerability in FLXEON. Session management was not sufficient to prevent unauthorized HTTPS requests. This issue affects FLXEON: through <= 9.3.4.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-051-02 updated cvss 9.4

ABB FLXEON Controllers

  • ABB CBXi <=9.3.4 ABB FBTi <=9.3.4
    affected
  • ABB FBVi <=9.3.4
    affected: vendor fix
  • ABB FLXEON Controllers <=9.3.4
    affected
  • ABB CBXi >=9.3.5 ABB FBTi >=9.3.5 ABB FBVi >=9.3.5 ABB FLXEON Controllers >=9.3.5
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Timeline

  1. Published
  2. First public exploit (EDB-52184)

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52184 ABB Cylon FLXeon 9.3.4 - WebSocket Command Spawning hardware, 2025-04-11

CVSS scores

assigned by version score vector
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
CNA 4.0 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • ABB FLXEON

Classification

Weakness
  • CWE-1385 Missing Origin Validation in WebSockets

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.