CVE-2024-20540Network attack vector

Stored XSS via unvalidated web interface input

Published Nov 6, 2024 · Updated Nov 6, 2024

Stored XSS in Cisco Unified Contact Center Management Portal allows remote authenticated users to execute script in another user's browser. The web interface stores malicious code submitted to a specific page without properly validating the input, then runs it when another user loads the page. A Supervisor role is required to plant the payload, and exploitation exposes sensitive browser information or alters actions available in the victim's interface.

CVSS severity5.4
Medium
EPSS probability0.27%
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 Unified Contact Center Management Portal allows remote authenticated users to execute script in another user's browser. The web interface stores malicious code submitted to a specific page without properly validating the input, then runs it when another user loads the page. A Supervisor role is required to plant the payload, and exploitation exposes sensitive browser information or alters actions available in the victim's interface.

The record

CVE
CVE-2024-20540
Published
Nov 6, 2024
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Unified Contact Center Management Portal
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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=10.5(1)
  2. Affected versionversion=10.5(1)ES1
  3. Affected versionversion=10.5(1)ES10
  4. Affected versionversion=10.5(1)ES11
  5. Affected versionversion=10.5(1)ES12
  6. Affected versionversion=10.5(1)ES13
  7. Affected versionversion=10.5(1)ES2
  8. Affected versionversion=10.5(1)ES3
  9. Affected versionversion=10.5(1)ES4
  10. Affected versionversion=10.5(1)ES5
  11. Affected versionversion=10.5(1)ES6
  12. Affected versionversion=10.5(1)ES7
  13. Affected versionversion=10.5(1)ES8
  14. Affected versionversion=10.5(1)ES9
  15. Affected versionversion=11.0(1)
  16. Affected versionversion=11.0(1)ES1
  17. Affected versionversion=11.0(1)ES2
  18. Affected versionversion=11.0(1)ES3
  19. Affected versionversion=11.5(1)
  20. Affected versionversion=11.5(1)ES1
  21. Affected versionversion=11.5(1)ES2
  22. Affected versionversion=11.5(1)ES3
  23. Affected versionversion=11.5(1)ES4
  24. Affected versionversion=11.5(1)ES5
  25. Affected versionversion=11.5(1)ES6
  26. Affected versionversion=11.5(1)ES7
  27. Affected versionversion=11.5(1)ES8
  28. Affected versionversion=11.5(1)ES9
  29. Affected versionversion=11.6(1)
  30. Affected versionversion=11.6(1)ES1
  31. Affected versionversion=11.6(1)_ES10
  32. Affected versionversion=11.6(1)_ES11
  33. Affected versionversion=11.6(1)_ES12
  34. Affected versionversion=11.6(1)_ES13
  35. Affected versionversion=11.6(1)_ES14
  36. Affected versionversion=11.6(1)_ES15
  37. Affected versionversion=11.6(1)_ES16
  38. Affected versionversion=11.6(1)_ES17
  39. Affected versionversion=11.6(1)ES2
  40. Affected versionversion=11.6(1)_ES3
  41. Affected versionversion=11.6(1)_ES4
  42. Affected versionversion=11.6(1)_ES5
  43. Affected versionversion=11.6(1)_ES6
  44. Affected versionversion=11.6(1)_ES7
  45. Affected versionversion=11.6(1)_ES9
  46. Affected versionversion=12.0(1)
  47. Affected versionversion=12.0(1)_ES1
  48. Affected versionversion=12.0(1)_ES2
  49. Affected versionversion=12.0(1)_ES3
  50. Affected versionversion=12.0(1)_ES4
  51. Affected versionversion=12.0(1)_ES5
  52. Affected versionversion=12.5(1)
  53. Affected versionversion=12.5(1)_ES1
  54. Affected versionversion=12.5(1)_ES10
  55. Affected versionversion=12.5(1)_ES11
  56. Affected versionversion=12.5(1)_ES12
  57. Affected versionversion=12.5(1)_ES2
  58. Affected versionversion=12.5(1)_ES3
  59. Affected versionversion=12.5(1)_ES4
  60. Affected versionversion=12.5(1)_ES5
  61. Affected versionversion=12.5(1)_ES6
  62. Affected versionversion=12.5(1)_ES7
  63. Affected versionversion=12.5(1)_ES8
  64. Affected versionversion=12.5(1)_ES9
  65. Affected versionversion=12.6(1)
  66. Affected versionversion=12.6(1)_ES1
  67. Affected versionversion=12.6(1)_ES10
  68. Affected versionversion=12.6(1)_ES11
  69. Affected versionversion=12.6(1)_ES12
  70. Affected versionversion=12.6(1)_ES13
  71. Affected versionversion=12.6(1)_ES2
  72. Affected versionversion=12.6(1)_ES3
  73. Affected versionversion=12.6(1)_ES4
  74. Affected versionversion=12.6(1)_ES5
  75. Affected versionversion=12.6(1)_ES6
  76. Affected versionversion=12.6(1)_ES7
  77. Affected versionversion=12.6(1)_ES8
  78. Affected versionversion=12.6(1)_ES9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Unified Contact Center Management Portalversion=10.5(1); version=10.5(1)ES1; version=10.5(1)ES10; version=10.5(1)ES11; version=10.5(1)ES12; version=10.5(1)ES13; version=10.5(1)ES2; version=10.5(1)ES3; version=10.5(1)ES4; version=10.5(1)ES5; version=10.5(1)ES6; version=10.5(1)ES7; version=10.5(1)ES8; version=10.5(1)ES9; version=11.0(1); version=11.0(1)ES1; version=11.0(1)ES2; version=11.0(1)ES3; version=11.5(1); version=11.5(1)ES1; version=11.5(1)ES2; version=11.5(1)ES3; version=11.5(1)ES4; version=11.5(1)ES5; version=11.5(1)ES6; version=11.5(1)ES7; version=11.5(1)ES8; version=11.5(1)ES9; version=11.6(1); version=11.6(1)ES1; version=11.6(1)_ES10; version=11.6(1)_ES11; version=11.6(1)_ES12; version=11.6(1)_ES13; version=11.6(1)_ES14; version=11.6(1)_ES15; version=11.6(1)_ES16; version=11.6(1)_ES17; version=11.6(1)ES2; version=11.6(1)_ES3; version=11.6(1)_ES4; version=11.6(1)_ES5; version=11.6(1)_ES6; version=11.6(1)_ES7; version=11.6(1)_ES9; version=12.0(1); version=12.0(1)_ES1; version=12.0(1)_ES2; version=12.0(1)_ES3; version=12.0(1)_ES4; version=12.0(1)_ES5; version=12.5(1); version=12.5(1)_ES1; version=12.5(1)_ES10; version=12.5(1)_ES11; version=12.5(1)_ES12; version=12.5(1)_ES2; version=12.5(1)_ES3; version=12.5(1)_ES4; version=12.5(1)_ES5; version=12.5(1)_ES6; version=12.5(1)_ES7; version=12.5(1)_ES8; version=12.5(1)_ES9; version=12.6(1); version=12.6(1)_ES1; version=12.6(1)_ES10; version=12.6(1)_ES11; version=12.6(1)_ES12; version=12.6(1)_ES13; version=12.6(1)_ES2; version=12.6(1)_ES3; version=12.6(1)_ES4; version=12.6(1)_ES5; version=12.6(1)_ES6; version=12.6(1)_ES7; version=12.6(1)_ES8; version=12.6(1)_ES9

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')
T1059.007JavaScript/JScript

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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