CVE-2020-3157Network attack vector

Stored XSS via insufficient configuration validation

Published Mar 4, 2020 · Updated Nov 15, 2024

Stored XSS in Cisco Identity Services Engine 2.7 and earlier allows remote authenticated users to execute scripts via saved configurations. The web management interface saves configuration input without sufficient validation and later renders it when an administrator views the configuration. Exploitation requires write permission and an administrator to view the saved configuration, exposing browser-based information or actions in that interface.

CVSS severity5.4
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 Identity Services Engine 2.7 and earlier allows remote authenticated users to execute scripts via saved configurations. The web management interface saves configuration input without sufficient validation and later renders it when an administrator views the configuration. Exploitation requires write permission and an administrator to view the saved configuration, exposing browser-based information or actions in that interface.

The record

CVE
CVE-2020-3157
Published
Mar 4, 2020
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco Identity Services Engine
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 4, 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=unspecified <n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Identity Services Engineversion=unspecified <n/a

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4CiscoCVSS:3.0/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')
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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