CVE-2021-1250Network attack vector

Authenticated script execution via insufficient input validation

Published Jan 20, 2021 · Updated Nov 12, 2024

Cross-site scripting in Cisco Data Center Network Manager before 11.5(1) allows remote authenticated users to execute script in the web interface. The web-based management interface accepts malicious data in specific fields without sufficient validation and processes it as active script in another interface user's browser. Network-operator privileges and interaction by another interface user are required; execution is confined to the affected interface context and browser data.

CVSS severity5.9
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Cisco Data Center Network Manager before 11.5(1) allows remote authenticated users to execute script in the web interface. The web-based management interface accepts malicious data in specific fields without sufficient validation and processes it as active script in another interface user's browser. Network-operator privileges and interaction by another interface user are required; execution is confined to the affected interface context and browser data.

The record

CVE
CVE-2021-1250
Published
Jan 20, 2021
Updated
Nov 12, 2024
Vendor
ClamAV
Product
Cisco Data Center Network Manager
Classifications
CWE-20, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 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 Data Center Network Managerversion=n/a

Published CVSS scores

5.9CiscoCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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.

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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-20Improper Input Validation
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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