CVE-2020-3233Network attack vector

Stored XSS via unvalidated system settings input

Published Jun 3, 2020 · Updated Nov 15, 2024

Stored XSS in Cisco IOx Local Manager before 1.9.0 allows remote authenticated users to execute scripts through system settings. The web interface stores attacker-supplied code from a system settings tab without sufficient input validation, causing execution in the affected interface. Valid Local Manager credentials are required; execution occurs in the interface context and exposes browser-based information.

CVSS severity6.4
Medium
EPSS probability0.63%
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 IOx Local Manager before 1.9.0 allows remote authenticated users to execute scripts through system settings. The web interface stores attacker-supplied code from a system settings tab without sufficient input validation, causing execution in the affected interface. Valid Local Manager credentials are required; execution occurs in the interface context and exposes browser-based information.

The record

CVE
CVE-2020-3233
Published
Jun 3, 2020
Updated
Nov 15, 2024
Vendor
Cisco
Product
Cisco IOx
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 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?

Cisco · Cisco IOxversion=n/a

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.4Cisco Systems, Inc.CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:X/RL:X/RC:X
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
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.

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Technologies

Your stack

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Your stack

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