Security readout for executives and security teams
Plain-English summary
This CVE affects the Image Resizer plugin for Craft CMS before version 2.0.9. A stored cross-site scripting flaw exists in the Bulk Resize action, meaning malicious script content could be saved and later run in another user’s browser. The public record does not provide severity scoring or exploit details.
Executive priority
Treat this as a targeted web application risk rather than a broad emergency. Prioritize confirming whether the plugin is installed and updating affected Craft CMS sites, because stored XSS can expose administrator sessions or content integrity if reachable.
Technical view
CVE-2020-13459 is stored XSS in the Bulk Resize action of the Image Resizer Craft CMS plugin before 2.0.9. The source bundle provides no CVSS, CWE, exploit prerequisites, payload details, or affected CPEs. The only concrete remediation signal is the version boundary before 2.0.9.
Likely exposure
Exposure is limited to Craft CMS environments using the Image Resizer plugin before 2.0.9, especially where users can access Bulk Resize workflows. The bundle does not identify affected hosting models, default configurations, or unauthenticated reachability.
Exploitation context
The sources do not show CISA KEV listing or active exploitation. Stored XSS can matter because script execution may persist across sessions, but the bundle does not confirm exploitability conditions, required privileges, or observed attacks.
Researcher notes
Evidence is sparse. The CVE record identifies stored XSS and the affected version range, but not the sink, input field, privilege boundary, or patch diff. Avoid assuming unauthenticated exploitation unless vendor or testing evidence confirms it.
Mitigation direction
- Upgrade Image Resizer for Craft CMS to version 2.0.9 or later.
- Review the vendor changelog for version-specific remediation notes.
- Restrict access to Bulk Resize workflows until patched.
- Inventory Craft CMS plugins across production and staging sites.
- Check vendor guidance if upgrade constraints exist.
Validation and detection
- Confirm installed Image Resizer plugin versions are 2.0.9 or later.
- Identify Craft CMS sites where the plugin is enabled.
- Verify who can access Bulk Resize functionality.
- Review security testing results for stored XSS findings in admin workflows.
- Document any systems temporarily unable to upgrade.
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
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CVE-2020-13459 mapping review
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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/verbb/image-resizer/blob/craft-3/CHANGELOG.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.