Security readout for executives and security teams
Plain-English summary
Schlix CMS 2.2.6-6 has an authenticated stored cross-site scripting issue in contact category titles. A logged-in user can save malicious script content that runs when others view the affected page. This can expose user data or alter page behavior inside the victim’s browser.
Executive priority
Treat as a moderate priority if Schlix CMS is internet-facing or has multiple content users. The main business risk is browser-side compromise of administrators or users, not direct server takeover based on the provided sources.
Technical view
CVE-2021-47834 is CWE-79 persistent XSS in the Schlix CMS contact category title field. The CVSS 3.1 score is 6.4, with network access, low complexity, low privileges, no user interaction, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure appears limited to organizations running Schlix CMS version 2.2.6-6 where authenticated users can create or edit contact categories. Public-facing admin or contributor access increases risk.
Exploitation context
The source bundle includes an Exploit-DB reference and a VulnCheck advisory, indicating public exploit information exists. The CVE is not listed as KEV, and the provided sources do not show active exploitation in the wild.
Researcher notes
Affected product evidence is specific to Schlix CMS 2.2.6-6. No CPEs are provided. Patch details are not included in the source bundle, so remediation should be verified against vendor guidance rather than assumed.
Mitigation direction
- Identify any Schlix CMS 2.2.6-6 deployments.
- Check Schlix vendor guidance for fixed versions or official mitigation.
- Restrict category creation and editing to trusted administrators.
- Review and clean untrusted category title content.
- Apply output encoding and input validation where custom controls exist.
Validation and detection
- Confirm the installed Schlix CMS version.
- Review user roles allowed to manage contact categories.
- Inspect contact category titles for script-like or unexpected markup.
- Check audit logs for recent category creation or edits.
- Validate remediation in a staging environment before production changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47834 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49837CVE reference · exploit
- Vendor HomepageCVE reference · product
- VulnCheck Advisory: Schlix CMS 2.2.6-6 - 'title' Persistent Cross-Site Scripting (Authenticated)CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.