CVE-2025-20351Network attack vector

Script execution via insufficient web input validation

Published Oct 15, 2025 · Updated Oct 15, 2025

Cross-site scripting in the web UI of Cisco SIP Software allows remote attackers to execute script code through a crafted link. The interface does not sufficiently validate user-supplied input before incorporating it into a generated page, so the crafted value runs in the affected interface. Exploitation requires Unified Communications Manager registration, nondefault Web Access, and a user clicking the link; executed script can access sensitive browser-based information.

CVSS severity6.1
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

Cross-site scripting in the web UI of Cisco SIP Software allows remote attackers to execute script code through a crafted link. The interface does not sufficiently validate user-supplied input before incorporating it into a generated page, so the crafted value runs in the affected interface. Exploitation requires Unified Communications Manager registration, nondefault Web Access, and a user clicking the link; executed script can access sensitive browser-based information.

The record

CVE
CVE-2025-20351
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
ClamAV
Product
Cisco Session Initiation Protocol (SIP) Software
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2025Record 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=10.1(1.9)
  2. Affected versionversion=10.1(1)SR1
  3. Affected versionversion=10.1(1)SR2
  4. Affected versionversion=10.2(1)
  5. Affected versionversion=10.2(1)SR1
  6. Affected versionversion=10.2(2)
  7. Affected versionversion=10.3(1)
  8. Affected versionversion=10.3(1.11) 3rd Party
  9. Affected versionversion=10.3(1.9) 3rd Party
  10. Affected versionversion=10.3(1)SR1
  11. Affected versionversion=10.3(1)SR2
  12. Affected versionversion=10.3(1)SR3
  13. Affected versionversion=10.3(1)SR4
  14. Affected versionversion=10.3(1)SR4b
  15. Affected versionversion=10.3(1)SR5
  16. Affected versionversion=10.3(1)SR6
  17. Affected versionversion=10.3(1)SR7
  18. Affected versionversion=10.3(2)
  19. Affected versionversion=10.4(1) 3rd Party
  20. Affected versionversion=10.4(1)SR2 3rd Party
  21. Affected versionversion=11.0(0.7) MPP
  22. Affected versionversion=11.0(1)
  23. Affected versionversion=11-0-1MSR1-1
  24. Affected versionversion=11.0(2)
  25. Affected versionversion=11.0(2)SR1
  26. Affected versionversion=11.0(2)SR2
  27. Affected versionversion=11.0(3)
  28. Affected versionversion=11.0(3)SR1
  29. Affected versionversion=11.0(3)SR2
  30. Affected versionversion=11.0(3)SR3
  31. Affected versionversion=11.0(3)SR4
  32. Affected versionversion=11.0(3)SR5
  33. Affected versionversion=11.0(3)SR6
  34. Affected versionversion=11.0(4)
  35. Affected versionversion=11.0(4)SR1
  36. Affected versionversion=11.0(4)SR2
  37. Affected versionversion=11.0(4)SR3
  38. Affected versionversion=11.0(5)
  39. Affected versionversion=11.0(5)SR1
  40. Affected versionversion=11.0(5)SR2
  41. Affected versionversion=11.0(5)SR3
  42. Affected versionversion=11.0(6)
  43. Affected versionversion=11.0(6)SR1
  44. Affected versionversion=11.0(6)SR2
  45. Affected versionversion=11.0(6)SR4
  46. Affected versionversion=11.0(6)SR5
  47. Affected versionversion=11.0(6)SR6
  48. Affected versionversion=11.5(1)
  49. Affected versionversion=11.5(1)SR1
  50. Affected versionversion=11.7(1)
  51. Affected versionversion=12.0(1)
  52. Affected versionversion=12.0(1)SR1
  53. Affected versionversion=12.0(1)SR2
  54. Affected versionversion=12.0(1)SR3
  55. Affected versionversion=12.1(1)
  56. Affected versionversion=12.1(1)SR1
  57. Affected versionversion=12.5(1)
  58. Affected versionversion=12.5(1)SR1
  59. Affected versionversion=12.5(1)SR2
  60. Affected versionversion=12.5(1)SR3
  61. Affected versionversion=12.6(1)
  62. Affected versionversion=12.6(1)SR1
  63. Affected versionversion=12.7(1)
  64. Affected versionversion=12.7(1)SR1
  65. Affected versionversion=12.8(1)
  66. Affected versionversion=12.8(1)SR1
  67. Affected versionversion=12.8(1)SR2
  68. Affected versionversion=14.0(1)
  69. Affected versionversion=14.0(1)SR1
  70. Affected versionversion=14.0(1)SR2
  71. Affected versionversion=14.0(1)SR3
  72. Affected versionversion=14.1(1)
  73. Affected versionversion=14.1(1)SR1
  74. Affected versionversion=14.1(1)SR2
  75. Affected versionversion=14.1(1)SR3
  76. Affected versionversion=14.2(1)
  77. Affected versionversion=14.2(1)SR1
  78. Affected versionversion=14.2(1)SR2
  79. Affected versionversion=14.2(1)SR3
  80. Affected versionversion=14.2(1)SR4
  81. Affected versionversion=14.3(1)
  82. Affected versionversion=14.3(1)SR1
  83. Affected versionversion=14.3(1)SR2
  84. Affected versionversion=14.3(1)SR3
  85. Affected versionversion=2.0(1)
  86. Affected versionversion=2.1(1)
  87. Affected versionversion=2.2(1)
  88. Affected versionversion=2.3(1)
  89. Affected versionversion=2.3(1)SR1
  90. Affected versionversion=3.0(1)
  91. Affected versionversion=3.1(1)
  92. Affected versionversion=3.1(1)SR1
  93. Affected versionversion=3.2(1)
  94. Affected versionversion=9.3(3)
  95. Affected versionversion=9.3(4) 3rd Party
  96. Affected versionversion=9.3(4)SR1 3rd Party
  97. Affected versionversion=9.3(4)SR2 3rd Party
  98. Affected versionversion=9.3(4)SR3 3rd Party

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Session Initiation Protocol (SIP) Softwareversion=10.1(1.9); version=10.1(1)SR1; version=10.1(1)SR2; version=10.2(1); version=10.2(1)SR1; version=10.2(2); version=10.3(1); version=10.3(1.11) 3rd Party; version=10.3(1.9) 3rd Party; version=10.3(1)SR1; version=10.3(1)SR2; version=10.3(1)SR3; version=10.3(1)SR4; version=10.3(1)SR4b; version=10.3(1)SR5; version=10.3(1)SR6; version=10.3(1)SR7; version=10.3(2); version=10.4(1) 3rd Party; version=10.4(1)SR2 3rd Party; version=11.0(0.7) MPP; version=11.0(1); version=11-0-1MSR1-1; version=11.0(2); version=11.0(2)SR1; version=11.0(2)SR2; version=11.0(3); version=11.0(3)SR1; version=11.0(3)SR2; version=11.0(3)SR3; version=11.0(3)SR4; version=11.0(3)SR5; version=11.0(3)SR6; version=11.0(4); version=11.0(4)SR1; version=11.0(4)SR2; version=11.0(4)SR3; version=11.0(5); version=11.0(5)SR1; version=11.0(5)SR2; version=11.0(5)SR3; version=11.0(6); version=11.0(6)SR1; version=11.0(6)SR2; version=11.0(6)SR4; version=11.0(6)SR5; version=11.0(6)SR6; version=11.5(1); version=11.5(1)SR1; version=11.7(1); version=12.0(1); version=12.0(1)SR1; version=12.0(1)SR2; version=12.0(1)SR3; version=12.1(1); version=12.1(1)SR1; version=12.5(1); version=12.5(1)SR1; version=12.5(1)SR2; version=12.5(1)SR3; version=12.6(1); version=12.6(1)SR1; version=12.7(1); version=12.7(1)SR1; version=12.8(1); version=12.8(1)SR1; version=12.8(1)SR2; version=14.0(1); version=14.0(1)SR1; version=14.0(1)SR2; version=14.0(1)SR3; version=14.1(1); version=14.1(1)SR1; version=14.1(1)SR2; version=14.1(1)SR3; version=14.2(1); version=14.2(1)SR1; version=14.2(1)SR2; version=14.2(1)SR3; version=14.2(1)SR4; version=14.3(1); version=14.3(1)SR1; version=14.3(1)SR2; version=14.3(1)SR3; version=2.0(1); version=2.1(1); version=2.2(1); version=2.3(1); version=2.3(1)SR1; version=3.0(1); version=3.1(1); version=3.1(1)SR1; version=3.2(1); version=9.3(3); version=9.3(4) 3rd Party; version=9.3(4)SR1 3rd Party; version=9.3(4)SR2 3rd Party; version=9.3(4)SR3 3rd Party

Published CVSS scores

6.1Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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