HIGH SeverityCVSS 4.08.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVE-2021-47976
Last updated May 16, 2026 · Published May 16, 2026
Description
TextPattern CMS 4.9.0-dev contains a remote code execution vulnerability that allows authenticated attackers to upload arbitrary PHP files by exploiting the plugin upload functionality. Attackers can authenticate, retrieve a CSRF token from the plugin event page, and upload malicious PHP files to the textpattern/tmp/ directory for code execution.
Affected products
1 listed- Textpattern:TextPattern CMS
Mappings
CWE
CWE-352
CAPEC
None listed.
Related
Research
- Cross-site request forgery (CSRF): how it works and how to defend itCross-site request forgery (CSRF) lets attackers reuse a victim's session cookie from another site. SameSite…
- Session management: secure cookies, rotation, and lifetimeSession management is the spine of authenticated web apps. Use HttpOnly, Secure, SameSite cookies, rotate on…
Training
- Session ManagementTokens, cookies, and state - keeping sessions secure in stateless architectures.
- Injection TodaySQL, NoSQL, ORM, and LLM injection - what's changed and what hasn't.
- Input Validation and Schema EnforcementValidate early, validate strictly - schemas, allowlists, and type-safe boundaries.
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