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Fencer Intel
medium 5.4

CVE-2021-40440 json

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

published 5y ago modified 2mo ago also EUVD-2021-27617

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

Patch / fix

  • Microsoft Microsoft Dynamics 365 Business Central 2020 Release Wave 2 – Update 17.10 17.0.29460
  • Microsoft Microsoft Dynamics 365 Business Central 2021 Release Wave 1 - Update 18.5 18.0.29486

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Exploit prediction

1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • Microsoft Microsoft Dynamics 365 Business Central 2020 Release Wave 2 – Update 17.10
  • Microsoft Microsoft Dynamics 365 Business Central 2021 Release Wave 1 - Update 18.5

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.