CVE-2021-47976

TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload

CVSS 8.7 HIGHEPSS 0.3%CWE-352

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.7EPSS 0.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

16 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Textpattern · TextPattern CMS

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/50095unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://github.com/textpattern/textpattern https://textpattern.com/https://www.exploit-db.com/exploits/50095 https://www.vulncheck.com/advisories/textpattern-cms-dev-authenticated-remote-code-execution-via-plugin-upload