CVE-2021-1463Network attack vector

Reflected XSS via improper input validation

Published Apr 8, 2021 · Updated Nov 8, 2024

Reflected XSS in Cisco Unified Contact Center Express 11.6(1) and earlier, 12.0(1), and 12.5(1) allows remote attackers to run browser scripts. The bundled Unified Intelligence Center web interface fails to validate user-supplied input before reflecting it into a page, enabling arbitrary script execution in the interface's browser context. Exploitation requires a user to follow an attacker-crafted link, after which browser-based information can be read or altered in that user's interface session.

CVSS severity6.1
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Cisco Unified Contact Center Express 11.6(1) and earlier, 12.0(1), and 12.5(1) allows remote attackers to run browser scripts. The bundled Unified Intelligence Center web interface fails to validate user-supplied input before reflecting it into a page, enabling arbitrary script execution in the interface's browser context. Exploitation requires a user to follow an attacker-crafted link, after which browser-based information can be read or altered in that user's interface session.

The record

CVE
CVE-2021-1463
Published
Apr 8, 2021
Updated
Nov 8, 2024
Vendor
ClamAV
Product
Cisco Unified Contact Center Express
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Contact Center Expressversion=n/a

Published CVSS scores

6.1CiscoCVSS: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')
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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