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Fencer Intel
critical 9.3

CVE-2026-60043 json

XSS in backend

published 2d ago modified 2d ago also EUVD-2026-120863

cvss
9.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

An unauthenticated remote attacker can perform a XSS attack on a logged in backend user allowing for execution of multiple critical system actions. This could allow an attacker to shutdown the server or restore an uploaded backup. This can result in a loss of integrity and availability.

Patch / fix

  • MB connect line mbCONNECT24 2.21.0
  • MB connect line mymbCONNECT24 2.21.0
  • Helmholz myREX24V2 2.21.0
  • Helmholz myREX24V2.virtual 2.21.0

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Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 4.0 6.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
CNA 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
CNA 4.0 6.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H/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
NVD 3.1 9.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H

Affected products

  • MB connect line mbCONNECT24
  • MB connect line mymbCONNECT24
  • Helmholz myREX24V2
  • Helmholz myREX24V2.virtual

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel 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.