Security readout for executives and security teams
Plain-English summary
CVE-2018-20757 is an XSS issue in MODX Revolution through version 2.7.0-pl. Malicious script content could be placed in extended user field metadata, such as container or attribute names, and execute when viewed in the application. Business impact depends on who can edit those fields and who later views them.
Executive priority
Prioritize this for MODX-backed public sites or portals with delegated user administration. It is not supported as a known actively exploited issue in the supplied sources, but XSS in a CMS can affect administrator sessions and site integrity.
Technical view
The CVE describes cross-site scripting through MODX Revolution extended user fields, specifically field metadata such as Container name or Attribute name. The bundle does not include CVSS, CWE, fixed-version, or exploitability details. Treat exposed administrative or user-management surfaces as the main validation area.
Likely exposure
Organizations running MODX Revolution version 2.7.0-pl or earlier may be exposed, especially where untrusted or lower-privileged users can create or modify extended user fields. The provided affected-product metadata is incomplete, so inventory must confirm actual MODX versions and feature usage.
Exploitation context
The sources do not state active exploitation, public exploit availability, authentication requirements, or attack complexity. It is not listed as CISA KEV in the supplied bundle. Risk is higher if the vulnerable fields are editable by users other than trusted administrators.
Researcher notes
Evidence is sparse: the CVE text names the vulnerable product range and affected field types, but omits root cause, fixed commit, affected components, CVSS, and reproduction details. Validate through vendor issue history and local code review without assuming exploit prerequisites.
Mitigation direction
- Check MODX vendor guidance and release notes for the corrected version.
- Upgrade MODX Revolution if a vendor-fixed release is available.
- Restrict who can create or edit extended user fields.
- Review custom extended user field metadata for unsafe script-like content.
- Limit administrative interface exposure to trusted networks where feasible.
Validation and detection
- Inventory MODX Revolution instances and confirm versions are not through 2.7.0-pl.
- Identify sites using extended user fields in user management workflows.
- Review permissions for creating or modifying extended user fields.
- Inspect extended user field container and attribute names for suspicious content.
- Check application logs for unexpected user-field administration activity.
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.
Container behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-20757 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/modxcms/revolution/issues/14104CVE 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.