CVE-2025-20330Network attack vector

Browser script execution via unvalidated crafted links

Published Sep 3, 2025 · Updated Feb 26, 2026

Cross-site scripting in affected Cisco Unified CM IM&P 12.5, 14, and 15 releases allows remote attackers to execute script via crafted links. The web management interface fails to validate user-supplied input before incorporating it into browser content; Cisco has not disclosed the affected endpoint or parameter. Exploitation requires a user to open the link, after which script runs in the interface context and can read or alter browser-accessible information.

CVSS severity6.1
Medium
EPSS probability0.25%
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 affected Cisco Unified CM IM&P 12.5, 14, and 15 releases allows remote attackers to execute script via crafted links. The web management interface fails to validate user-supplied input before incorporating it into browser content; Cisco has not disclosed the affected endpoint or parameter. Exploitation requires a user to open the link, after which script runs in the interface context and can read or alter browser-accessible information.

The record

CVE
CVE-2025-20330
Published
Sep 3, 2025
Updated
Feb 26, 2026
Vendor
ClamAV
Product
Cisco Unified Communications Manager IM and Presence Service
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=12.5(1)
  2. Affected versionversion=12.5(1)SU1
  3. Affected versionversion=12.5(1)SU2
  4. Affected versionversion=12.5(1)SU3
  5. Affected versionversion=12.5(1)SU4
  6. Affected versionversion=12.5(1)SU5
  7. Affected versionversion=12.5(1)SU6
  8. Affected versionversion=12.5(1)SU7
  9. Affected versionversion=12.5(1)SU8
  10. Affected versionversion=12.5(1)SU9
  11. Affected versionversion=14
  12. Affected versionversion=14SU1
  13. Affected versionversion=14SU2
  14. Affected versionversion=14SU2a
  15. Affected versionversion=14SU3
  16. Affected versionversion=14SU4
  17. Affected versionversion=15
  18. Affected versionversion=15SU1
  19. Affected versionversion=15SU2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Communications Manager IM and Presence Serviceversion=12.5(1); version=12.5(1)SU1; version=12.5(1)SU2; version=12.5(1)SU3; version=12.5(1)SU4; version=12.5(1)SU5; version=12.5(1)SU6; version=12.5(1)SU7; version=12.5(1)SU8; version=12.5(1)SU9; version=14; version=14SU1; version=14SU2; version=14SU2a; version=14SU3; version=14SU4; version=15; version=15SU1; version=15SU2

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/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
Privilegesunauthenticated
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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