Security readout for executives and security teams
Plain-English summary
CVE-2018-7893 describes stored cross-site scripting in CMS Made Simple 2.2.6. A metadata value handled by admin/moduleinterface.php can be stored and later rendered in a way that runs script in a user's browser. The source bundle does not provide CVSS, affected-version range beyond 2.2.6, or a named patch.
Executive priority
Prioritize remediation for internet-exposed CMSMS 2.2.6 sites, especially where many users have administrative or module-management access. This is not marked as actively exploited in the supplied sources, but stored XSS in an admin context can support account abuse and site compromise.
Technical view
The reported flaw is stored XSS in CMS Made Simple 2.2.6 through the metadata parameter in admin/moduleinterface.php. Because the path is administrative, exposure likely depends on access to CMSMS admin/module functionality, but the provided sources do not define required privileges. Stored XSS risk includes session abuse, unauthorized admin actions, and content manipulation if an administrator views the stored value.
Likely exposure
Organizations running CMS Made Simple 2.2.6 are the clearest exposure. Other CMSMS versions are not confirmed affected in the provided bundle. Public-facing sites are more concerning when the administrative interface is internet-accessible or when multiple semi-trusted users can manage modules or metadata.
Exploitation context
The bundle includes a public GitHub reference but no CISA KEV listing and no cited evidence of active exploitation. Treat this as publicly documented vulnerability information, not confirmed in-the-wild exploitation. Do not assume compromise solely from version presence.
Researcher notes
Evidence is limited to the CVE description and linked public reference. No CVSS, CWE, CPE, fixed version, or exploit-in-the-wild confirmation is supplied. Validate privilege requirements and affected-version scope against vendor advisories before broad vulnerability management actions.
Mitigation direction
- Check CMS Made Simple vendor guidance for fixed versions or official remediation.
- Upgrade affected CMSMS 2.2.6 instances if a vendor-supported fixed release is available.
- Restrict administrative interface access to trusted users and networks.
- Review admin accounts and module-management permissions for unnecessary access.
- Apply web security headers as defense-in-depth, not as the primary fix.
Validation and detection
- Inventory CMS Made Simple instances and confirm running versions.
- Identify whether any instance is running CMSMS 2.2.6.
- Confirm whether admin/moduleinterface.php is reachable from untrusted networks.
- Review CMSMS admin and module permissions for users who can modify metadata.
- Check logs and content records for suspicious metadata 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.
CVE-2018-7893 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ibey0nd/CVE/blob/master/CMS%20Made%20Simple%20Stored%20XSS.mdCVE reference · x_refsource_MISC
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.