CVE-2021-40131Network attack vector

Stored XSS via unsanitized configuration input

Published Nov 18, 2021 · Updated Nov 7, 2024

Stored XSS in Cisco Common Services Platform Collector before 2.9.1.1 allows remote authenticated users to execute browser code. The web-based management interface stores malicious code added to configuration without adequately validating the user-supplied input. Administrative interface privileges are required; execution occurs in the interface context and can expose sensitive browser data.

CVSS severity5.5
Medium
EPSS probability0.72%
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 Common Services Platform Collector before 2.9.1.1 allows remote authenticated users to execute browser code. The web-based management interface stores malicious code added to configuration without adequately validating the user-supplied input. Administrative interface privileges are required; execution occurs in the interface context and can expose sensitive browser data.

The record

CVE
CVE-2021-40131
Published
Nov 18, 2021
Updated
Nov 7, 2024
Vendor
ClamAV
Product
Cisco Common Services Platform Collector (CSPC)
Classifications
CWE-87, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 18, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 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 Common Services Platform Collector (CSPC)version=n/a

Published CVSS scores

5.5Cisco PSIRTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-87Improper Neutralization of Alternate XSS Syntax
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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