CVE-2022-20802Network attack vector

Agent-browser code execution via unvalidated web input

Published May 27, 2022 · Updated Nov 6, 2024

Stored XSS in Cisco Enterprise Chat and Email 12.6(1) ES2 and earlier allows remote authenticated users to execute code in an agent's browser. The web interface stores user-supplied input from a crafted HTTP request without sufficient validation and later renders it for another interface user. Valid agent credentials and interaction by another interface user are required; successful exploitation accesses browser-based information or runs arbitrary interface-context code.

CVSS severity5.4
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Cisco Enterprise Chat and Email 12.6(1) ES2 and earlier allows remote authenticated users to execute code in an agent's browser. The web interface stores user-supplied input from a crafted HTTP request without sufficient validation and later renders it for another interface user. Valid agent credentials and interaction by another interface user are required; successful exploitation accesses browser-based information or runs arbitrary interface-context code.

The record

CVE
CVE-2022-20802
Published
May 27, 2022
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Enterprise Chat and Email
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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 privilegesauthenticated

What is affected?

ClamAV · Cisco Enterprise Chat and Emailversion=n/a

Published CVSS scores

5.4CiscoCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
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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