CVE-2021-1245Network attack vector

Script execution via unvalidated editor input

Published Jan 13, 2021 · Updated Sep 16, 2024

Cross-site scripting in Cisco Unified CVP 12.6(2) ES4 through ES17 allows remote attackers to execute script code via a crafted editor link. The web-based management interface fails to validate user-supplied OpenSocial Gadget Editor input before a browser processes it. Exploitation requires an interface user to follow the link; resulting code runs in the interface context and can read sensitive browser-based information.

CVSS severity6.1
Medium
EPSS probability1.36%
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 Unified CVP 12.6(2) ES4 through ES17 allows remote attackers to execute script code via a crafted editor link. The web-based management interface fails to validate user-supplied OpenSocial Gadget Editor input before a browser processes it. Exploitation requires an interface user to follow the link; resulting code runs in the interface context and can read sensitive browser-based information.

The record

CVE
CVE-2021-1245
Published
Jan 13, 2021
Updated
Sep 16, 2024
Vendor
ClamAV
Product
Cisco Unified Customer Voice Portal
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=12.6(2)_ES10
  2. Affected versionversion=12.6(2)_ES11
  3. Affected versionversion=12.6(2)_ES14
  4. Affected versionversion=12.6(2)_ES15
  5. Affected versionversion=12.6(2)_ES4
  6. Affected versionversion=12.6(2)_ES9
  7. Affected versionversion=12.6(2)_ET12
  8. Affected versionversion=12.6(2)_ET13
  9. Affected versionversion=12.6(2)_ET16
  10. Affected versionversion=12.6(2)_ET17
  11. Affected versionversion=12.6(2)_ET5
  12. Affected versionversion=12.6(2)_ET7
  13. Affected versionversion=12.6(2)_ET8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Customer Voice Portalversion=12.6(2)_ES10; version=12.6(2)_ES11; version=12.6(2)_ES14; version=12.6(2)_ES15; version=12.6(2)_ES4; version=12.6(2)_ES9; version=12.6(2)_ET12; version=12.6(2)_ET13; version=12.6(2)_ET16; version=12.6(2)_ET17; version=12.6(2)_ET5; version=12.6(2)_ET7; version=12.6(2)_ET8

Published CVSS scores

6.1CiscoCVSS: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')
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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