CVE-2021-4195Network attack vector

Browser script execution via unneutralized HTML attributes

Published Mar 14, 2023 · Updated May 18, 2026

Cross-site scripting in Firmanet Software and Technology Customer Relation Manager before 2022.03.13 allows remote attackers to inject script. TR-CERT has not disclosed the affected parameter, page, or rendering function; it identifies only inadequate neutralization in an HTML attribute context. Exploitation requires a user to render the crafted output and permits access to or modification of data within that browser session, without service interruption.

CVSS severity6.1
Medium
EPSS probability0.36%
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 Firmanet Software and Technology Customer Relation Manager before 2022.03.13 allows remote attackers to inject script. TR-CERT has not disclosed the affected parameter, page, or rendering function; it identifies only inadequate neutralization in an HTML attribute context. Exploitation requires a user to render the crafted output and permits access to or modification of data within that browser session, without service interruption.

The record

CVE
CVE-2021-4195
Published
Mar 14, 2023
Updated
May 18, 2026
Vendor
Firmanet Software and Technology
Product
Customer Relation Manager
Classifications
CWE-79, CAPEC-243
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 14, 2023CVE publishedPublication date reported by the CVE source.
  2. May 18, 2026Record 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=0 <2022.03.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Firmanet Software and Technology · Customer Relation Managerversion=0 <2022.03.13

Published CVSS scores

6.1National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1Computer Emergency Response Team of the Republic of TurkeyCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-243XSS Targeting HTML Attributes

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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