CVE-2021-37374Public exploitNetwork attack vector

Browser script execution via unsanitized Friendly Name

Published Feb 3, 2023 · Updated Mar 26, 2025

Stored XSS in all Teradek Clip firmware versions allows remote authenticated users to execute JavaScript via the Friendly Name setting. The web interface accepts an SVG onload handler in Services.Zeroconf.friendlyname at /cgi-bin/api.cgi and later renders the stored value as executable markup. A valid session is required to plant the payload, and execution occurs when another user loads the affected interface, exposing browser-held data and actions.

CVSS severity5.4
Medium
EPSS probability0.57%
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 all Teradek Clip firmware versions allows remote authenticated users to execute JavaScript via the Friendly Name setting. The web interface accepts an SVG onload handler in Services.Zeroconf.friendlyname at /cgi-bin/api.cgi and later renders the stored value as executable markup. A valid session is required to plant the payload, and execution occurs when another user loads the affected interface, exposing browser-held data and actions.

The record

CVE
CVE-2021-37374
Published
Feb 3, 2023
Updated
Mar 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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