CVE-2022-20839Network attack vector

Stored XSS via insufficiently validated interface fields

Published Nov 10, 2022 · Updated Aug 3, 2024

Stored XSS in Cisco Firepower Management Center Software allows remote authenticated users to execute script code through crafted interface fields. The web-based management interface stores insufficiently validated input from multiple data fields and renders it to another interface user; Cisco has not disclosed the individual fields or handlers. High-privilege FMC access and interaction by another interface user are required, and exploitation can expose browser data, alter interface content, or temporarily disrupt parts of the dashboard.

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 script code through crafted interface fields. The web-based management interface stores insufficiently validated input from multiple data fields and renders it to another interface user; Cisco has not disclosed the individual fields or handlers. High-privilege FMC access and interaction by another interface user are required, and exploitation can expose browser data, alter interface content, or temporarily disrupt parts of the dashboard.

The record

CVE
CVE-2022-20839
Published
Nov 10, 2022
Updated
Aug 3, 2024
Vendor
ClamAV
Product
Cisco Firepower Management Center
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=6.6.7
  45. Affected versionversion=6.7.0
  46. Affected versionversion=6.7.0.1
  47. Affected versionversion=6.7.0.2
  48. Affected versionversion=6.7.0.3
  49. Affected versionversion=7.0.0
  50. Affected versionversion=7.0.0.1
  51. Affected versionversion=7.0.1
  52. Affected versionversion=7.0.1.1
  53. Affected versionversion=7.0.2
  54. Affected versionversion=7.0.2.1
  55. Affected versionversion=7.0.3
  56. Affected versionversion=7.0.4
  57. Affected versionversion=7.1.0
  58. Affected versionversion=7.1.0.1
  59. Affected versionversion=7.1.0.2
  60. Affected versionversion=7.2.0
  61. Affected versionversion=7.2.0.1

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=6.6.7; 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; version=7.2.0; version=7.2.0.1

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/E:X/RL:X/RC:X

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
T1203Exploitation for Client Execution

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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