Flextype CMS 0.9.9 through 1.0.0-alpha.3 Stored XSS via Plugin Directory
Priority LOW 12CWE-79Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Flextype CMS versions 0.9.9 through 1.0.0-alpha.3 fail to HTML-escape plugin directory names in the dependency error page rendered by getValidPluginsDependencies(). Attackers with write access to the plugins directory can create a plugin with HTML characters in its name to execute arbitrary scripts in users' browsers when dependency validation fails.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00179 7th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89145
- 2026-10-03 Alias added: GHSA-gqrp-6638-7vpg
References
More flextype vulnerabilities
- TI-2026-61974 Flextype CMS through 1.0.0-alpha.3 Path Traversal via Entries REST API CVSS 4.0HIGH 7.2
- TI-2026-54247 Flextype CMS 1.0.0-dev RCE via POST /api/v1/query Endpoint CVSS 4.0HIGH 7.1
- TI-2026-60281 Flextype CMS through 1.0.0-alpha.3 API Token Exposure via Query String CVSS 4.0HIGH 8.2
Sources
- CVE-2026-89145 · CVE Program
- CVE-2026-89145 · NVD
- FIRST EPSS
- GHSA-gqrp-6638-7vpg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences