CVE-2022-39295Public exploitNetwork attack vector

Cross-site scripting via sequential filter bypass

Published Oct 13, 2022 · Updated Apr 22, 2025

Cross-site scripting in Knowage Server 6.0 through 7.4.21 and 8.0 through 8.0.8 allows remote attackers to execute script in a user's browser. XSSRequestWrapper.stripXSS removes matched substrings only once, so nested vbscript fragments can be reduced into script tags or a javascript scheme. Exploitation requires a user to render attacker-controlled input and permits script to read or alter data available to the Knowage origin.

CVSS severity6.1
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

Cross-site scripting in Knowage Server 6.0 through 7.4.21 and 8.0 through 8.0.8 allows remote attackers to execute script in a user's browser. XSSRequestWrapper.stripXSS removes matched substrings only once, so nested vbscript fragments can be reduced into script tags or a javascript scheme. Exploitation requires a user to render attacker-controlled input and permits script to read or alter data available to the Knowage origin.

The record

CVE
CVE-2022-39295
Published
Oct 13, 2022
Updated
Apr 22, 2025
Vendor
Knowage Labs
Product
Knowage Server
Classifications
CWE-79, CWE-87, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 2025Record 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=>= 6.0, < 7.4.22
  2. Affected versionversion=>= 8.0, < 8.0.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Knowage Labs · Knowage Serverversion=>= 6.0, < 7.4.22; version=>= 8.0, < 8.0.9

Published CVSS scores

6.1GitHubCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-87Improper Neutralization of Alternate XSS Syntax
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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