How severe is CVE-2021-4121?

CVE-2021-4121 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-4121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4121?

CVE-2021-4121 affects Yetiforce Yetiforce Customer Relationship Management. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-4121 published?

CVE-2021-4121 was published on 2021-12-16 and last updated on 2026-06-17.

CVE-2021-4121

CVE-2021-4121 is a medium-severity vulnerability in Yetiforce Yetiforce Customer Relationship Management with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Yetiforce Yetiforce Customer Relationship Management
Published: 2021-12-16
Last modified: 2026-06-17

Description

yetiforcecrm is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Frequently asked questions

What is CVE-2021-4121?: yetiforcecrm is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
How severe is CVE-2021-4121?: CVE-2021-4121 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-4121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4121?: CVE-2021-4121 affects Yetiforce Yetiforce Customer Relationship Management. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-4121 published?: CVE-2021-4121 was published on 2021-12-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yetiforce:yetiforce_customer_relationship_management:*:*:*:*:*:*:*:*

More vulnerabilities in Yetiforce Yetiforce Customer Relationship Management

CVE-2022-0269 — High (CVSS 8.0): Cross-Site Request Forgery (CSRF) in Packagist yetiforce/yetiforce-crm prior to 6.3.0.
CVE-2023-49508 — Medium (CVSS 6.5): Directory Traversal vulnerability in YetiForceCompany YetiForceCRM versions 6.4.0 and before allows a remote…
CVE-2022-1411 — Medium (CVSS 6.1): Unrestructed file upload in GitHub repository yetiforcecompany/yetiforcecrm prior to 6.4.0. Attacker can send malicious…
CVE-2021-4107 — Medium (CVSS 6.1): yetiforcecrm is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2022-3002 — Medium (CVSS 5.4): Cross-site Scripting (XSS) - Stored in GitHub repository yetiforcecompany/yetiforcecrm prior to 6.4.0.
CVE-2022-3005 — Medium (CVSS 5.4): Cross-site Scripting (XSS) - Stored in GitHub repository yetiforcecompany/yetiforcecrm prior to 6.4.0.

All CVEs affecting Yetiforce Yetiforce Customer Relationship Management →

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