CVE-2022-20959Public exploitNetwork attack vector

Administrator-browser script execution via unsanitized ERS parameter

Published Oct 26, 2022 · Updated Sep 16, 2024

Reflected XSS in Cisco Identity Services Engine ERS API allows remote authenticated users to execute script in an administrator's browser. The developer_usecases.jsp and developer_usecases_python.jsp endpoints reflect the id parameter into responses without sufficient sanitization. Exploitation requires ERS to be enabled and an authenticated administrator to open a crafted link, exposing browser-based information and actions available to that administrator.

CVSS severity6.1
Medium
EPSS probability0.81%
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 Identity Services Engine ERS API allows remote authenticated users to execute script in an administrator's browser. The developer_usecases.jsp and developer_usecases_python.jsp endpoints reflect the id parameter into responses without sufficient sanitization. Exploitation requires ERS to be enabled and an authenticated administrator to open a crafted link, exposing browser-based information and actions available to that administrator.

The record

CVE
CVE-2022-20959
Published
Oct 26, 2022
Updated
Sep 16, 2024
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 26, 2022CVE 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

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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 Identity Services Engineversion=n/a

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

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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