CVE-2022-20834Network attack vector

Browser script execution via insufficient input validation

Published Nov 10, 2022 · Updated Oct 25, 2024

Stored XSS in Cisco Firepower Management Center Software allows remote authenticated users to execute browser script via crafted fields. The web-based management interface stores crafted values from multiple data fields without sufficient validation before rendering them to another user. Exploitation requires high-privileged management access and user interaction, enabling script execution or browser-data access and, in some cases, temporary FMC Dashboard disruption.

CVSS severity4.8
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Cisco Firepower Management Center Software allows remote authenticated users to execute browser script via crafted fields. The web-based management interface stores crafted values from multiple data fields without sufficient validation before rendering them to another user. Exploitation requires high-privileged management access and user interaction, enabling script execution or browser-data access and, in some cases, temporary FMC Dashboard disruption.

The record

CVE
CVE-2022-20834
Published
Nov 10, 2022
Updated
Oct 25, 2024
Vendor
ClamAV
Product
Cisco Firepower Management Center
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.2.3
  2. Affected versionversion=6.2.3.1
  3. Affected versionversion=6.2.3.10
  4. Affected versionversion=6.2.3.11
  5. Affected versionversion=6.2.3.12
  6. Affected versionversion=6.2.3.13
  7. Affected versionversion=6.2.3.14
  8. Affected versionversion=6.2.3.15
  9. Affected versionversion=6.2.3.16
  10. Affected versionversion=6.2.3.17
  11. Affected versionversion=6.2.3.18
  12. Affected versionversion=6.2.3.2
  13. Affected versionversion=6.2.3.3
  14. Affected versionversion=6.2.3.4
  15. Affected versionversion=6.2.3.5
  16. Affected versionversion=6.2.3.6
  17. Affected versionversion=6.2.3.7
  18. Affected versionversion=6.2.3.8
  19. Affected versionversion=6.2.3.9
  20. Affected versionversion=6.4.0
  21. Affected versionversion=6.4.0.1
  22. Affected versionversion=6.4.0.10
  23. Affected versionversion=6.4.0.11
  24. Affected versionversion=6.4.0.12
  25. Affected versionversion=6.4.0.13
  26. Affected versionversion=6.4.0.14
  27. Affected versionversion=6.4.0.15
  28. Affected versionversion=6.4.0.2
  29. Affected versionversion=6.4.0.3
  30. Affected versionversion=6.4.0.4
  31. Affected versionversion=6.4.0.5
  32. Affected versionversion=6.4.0.6
  33. Affected versionversion=6.4.0.7
  34. Affected versionversion=6.4.0.8
  35. Affected versionversion=6.4.0.9
  36. Affected versionversion=6.6.0
  37. Affected versionversion=6.6.0.1
  38. Affected versionversion=6.6.1
  39. Affected versionversion=6.6.3
  40. Affected versionversion=6.6.4
  41. Affected versionversion=6.6.5
  42. Affected versionversion=6.6.5.1
  43. Affected versionversion=6.6.5.2
  44. Affected versionversion=6.7.0
  45. Affected versionversion=6.7.0.1
  46. Affected versionversion=6.7.0.2
  47. Affected versionversion=6.7.0.3
  48. Affected versionversion=7.0.0
  49. Affected versionversion=7.0.0.1
  50. Affected versionversion=7.0.1
  51. Affected versionversion=7.0.1.1
  52. Affected versionversion=7.0.2
  53. Affected versionversion=7.0.2.1
  54. Affected versionversion=7.0.3
  55. Affected versionversion=7.0.4
  56. Affected versionversion=7.1.0
  57. Affected versionversion=7.1.0.1
  58. Affected versionversion=7.1.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Firepower Management Centerversion=6.2.3; version=6.2.3.1; version=6.2.3.10; version=6.2.3.11; version=6.2.3.12; version=6.2.3.13; version=6.2.3.14; version=6.2.3.15; version=6.2.3.16; version=6.2.3.17; version=6.2.3.18; version=6.2.3.2; version=6.2.3.3; version=6.2.3.4; version=6.2.3.5; version=6.2.3.6; version=6.2.3.7; version=6.2.3.8; version=6.2.3.9; version=6.4.0; version=6.4.0.1; version=6.4.0.10; version=6.4.0.11; version=6.4.0.12; version=6.4.0.13; version=6.4.0.14; version=6.4.0.15; version=6.4.0.2; version=6.4.0.3; version=6.4.0.4; version=6.4.0.5; version=6.4.0.6; version=6.4.0.7; version=6.4.0.8; version=6.4.0.9; version=6.6.0; version=6.6.0.1; version=6.6.1; version=6.6.3; version=6.6.4; version=6.6.5; version=6.6.5.1; version=6.6.5.2; version=6.7.0; version=6.7.0.1; version=6.7.0.2; version=6.7.0.3; version=7.0.0; version=7.0.0.1; version=7.0.1; version=7.0.1.1; version=7.0.2; version=7.0.2.1; version=7.0.3; version=7.0.4; version=7.1.0; version=7.1.0.1; version=7.1.0.2

Published CVSS scores

4.8Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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