CVE-2021-47834Public exploitNetwork attack vector

Browser script execution via unescaped category titles

Published Jan 16, 2026 · Updated Jan 16, 2026

Stored cross-site scripting in SCHLIX CMS 2.2.6-6 allows remote authenticated users to run scripts in other users' browsers. The contact-category save handler accepts the multipart title field without effective output neutralization and later inserts it into breadcrumb link text as executable markup. An account able to create contact categories is required, and the payload runs when another user views the created category page.

CVSS severity5.1
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in SCHLIX CMS 2.2.6-6 allows remote authenticated users to run scripts in other users' browsers. The contact-category save handler accepts the multipart title field without effective output neutralization and later inserts it into breadcrumb link text as executable markup. An account able to create contact categories is required, and the payload runs when another user views the created category page.

The record

CVE
CVE-2021-47834
Published
Jan 16, 2026
Updated
Jan 16, 2026
Vendor
SCHLIX Web Inc
Product
SCHLIX CMS
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2026Record 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=2.2.6-6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SCHLIX Web Inc · SCHLIX CMSversion=2.2.6-6

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo