CVE-2021-4107Public exploitNetwork attack vector

Browser script execution via unvalidated WYSIWYG source input

Published Dec 14, 2021 · Updated Aug 3, 2024

Cross-site scripting in YetiForce CRM 6.3.0 and earlier allows remote attackers to execute script via WYSIWYG source input. The WYSIWYG editor accepted source-mode field values without server-side field validation, allowing crafted markup to reach rendered pages. The network attack requires a victim to render the crafted content, and execution remains confined to the victim's browser context.

CVSS severity6.1
Medium
EPSS probability0.78%
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 YetiForce CRM 6.3.0 and earlier allows remote attackers to execute script via WYSIWYG source input. The WYSIWYG editor accepted source-mode field values without server-side field validation, allowing crafted markup to reach rendered pages. The network attack requires a victim to render the crafted content, and execution remains confined to the victim's browser context.

The record

CVE
CVE-2021-4107
Published
Dec 14, 2021
Updated
Aug 3, 2024
Vendor
YetiForce
Product
YetiForce CRM
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <6.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

YetiForce · YetiForce CRMversion=unspecified <6.4.0

Published CVSS scores

5.3huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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