CVE-2024-20305Network attack vector

Authenticated script execution via unvalidated crafted links

Published Jan 26, 2024 · Updated Jun 3, 2025

Cross-site scripting in Cisco Unity Connection 14 and earlier allows remote authenticated users to execute script via a crafted link. The web-based management interface fails to validate user-supplied input carried by the link before processing it in the interface. Exploitation requires high privileges and a user to click the link; resulting code runs in the interface context and can access browser data.

CVSS severity4.8
Medium
EPSS probability0.35%
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 Cisco Unity Connection 14 and earlier allows remote authenticated users to execute script via a crafted link. The web-based management interface fails to validate user-supplied input carried by the link before processing it in the interface. Exploitation requires high privileges and a user to click the link; resulting code runs in the interface context and can access browser data.

The record

CVE
CVE-2024-20305
Published
Jan 26, 2024
Updated
Jun 3, 2025
Vendor
ClamAV
Product
Cisco Unity Connection
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=12.0(1)SU1
  2. Affected versionversion=12.0(1)SU2
  3. Affected versionversion=12.0(1)SU3
  4. Affected versionversion=12.0(1)SU4
  5. Affected versionversion=12.0(1)SU5
  6. Affected versionversion=12.5(1)
  7. Affected versionversion=12.5(1)SU1
  8. Affected versionversion=12.5(1)SU2
  9. Affected versionversion=12.5(1)SU3
  10. Affected versionversion=12.5(1)SU4
  11. Affected versionversion=12.5(1)SU5
  12. Affected versionversion=12.5(1)SU6
  13. Affected versionversion=12.5(1)SU7
  14. Affected versionversion=12.5(1)SU8
  15. Affected versionversion=12.5(1)SU8a
  16. Affected versionversion=14
  17. Affected versionversion=14SU1
  18. Affected versionversion=14SU2
  19. Affected versionversion=14SU3
  20. Affected versionversion=14SU3a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Unity Connectionversion=12.0(1)SU1; version=12.0(1)SU2; version=12.0(1)SU3; version=12.0(1)SU4; version=12.0(1)SU5; version=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)SU8a; version=14; version=14SU1; version=14SU2; version=14SU3; version=14SU3a

Published CVSS scores

4.8Cisco PSIRTCVSS: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
Privilegesadmin
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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