CVE-2024-20387Network attack vector

Stored XSS via improper web input sanitization

Published Oct 23, 2024 · Updated Oct 24, 2024

Stored XSS in Cisco Firepower Management Center allows remote authenticated users to plant malicious content through its web interface. The interface fails to sanitize user-supplied input before persisting it, but Cisco does not identify the affected field or handler. Exploitation requires valid privileges and a victim who clicks a crafted link, enabling the stored content to be used in an XSS attack.

CVSS severity5.4
Medium
EPSS probability0.29%
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 allows remote authenticated users to plant malicious content through its web interface. The interface fails to sanitize user-supplied input before persisting it, but Cisco does not identify the affected field or handler. Exploitation requires valid privileges and a victim who clicks a crafted link, enabling the stored content to be used in an XSS attack.

The record

CVE
CVE-2024-20387
Published
Oct 23, 2024
Updated
Oct 24, 2024
Vendor
ClamAV
Product
Cisco Firepower Management Center
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 24, 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=6.2.3.17
  2. Affected versionversion=6.2.3.18
  3. Affected versionversion=6.4.0.13
  4. Affected versionversion=6.4.0.14
  5. Affected versionversion=6.4.0.15
  6. Affected versionversion=6.4.0.16
  7. Affected versionversion=6.4.0.17
  8. Affected versionversion=6.4.0.18
  9. Affected versionversion=6.6.0
  10. Affected versionversion=6.6.0.1
  11. Affected versionversion=6.6.1
  12. Affected versionversion=6.6.3
  13. Affected versionversion=6.6.4
  14. Affected versionversion=6.6.5
  15. Affected versionversion=6.6.5.1
  16. Affected versionversion=6.6.5.2
  17. Affected versionversion=6.6.7
  18. Affected versionversion=6.6.7.1
  19. Affected versionversion=6.6.7.2
  20. Affected versionversion=7.0.6
  21. Affected versionversion=7.0.6.1
  22. Affected versionversion=7.0.6.2
  23. Affected versionversion=7.2.4
  24. Affected versionversion=7.2.4.1
  25. Affected versionversion=7.2.5
  26. Affected versionversion=7.2.5.1
  27. Affected versionversion=7.2.5.2
  28. Affected versionversion=7.2.6
  29. Affected versionversion=7.2.7
  30. Affected versionversion=7.2.8
  31. Affected versionversion=7.2.8.1
  32. Affected versionversion=7.3.0
  33. Affected versionversion=7.3.1
  34. Affected versionversion=7.3.1.1
  35. Affected versionversion=7.3.1.2
  36. Affected versionversion=7.4.0
  37. Affected versionversion=7.4.1
  38. Affected versionversion=7.4.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Firepower Management Centerversion=6.2.3.17; version=6.2.3.18; version=6.4.0.13; version=6.4.0.14; version=6.4.0.15; version=6.4.0.16; version=6.4.0.17; version=6.4.0.18; 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=6.6.7.1; version=6.6.7.2; version=7.0.6; version=7.0.6.1; version=7.0.6.2; version=7.2.4; version=7.2.4.1; version=7.2.5; version=7.2.5.1; version=7.2.5.2; version=7.2.6; version=7.2.7; version=7.2.8; version=7.2.8.1; version=7.3.0; version=7.3.1; version=7.3.1.1; version=7.3.1.2; version=7.4.0; version=7.4.1; version=7.4.1.1

Published CVSS scores

5.4Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/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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