CVE-2021-25094Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via dotfile ZIP upload

Published Apr 25, 2022 · Updated Apr 21, 2025

Remote code execution in BrandExponents Tatsu before 3.3.12 allows remote attackers to execute PHP code via a crafted ZIP upload. The unauthenticated add_custom_font AJAX action extracts an uploaded archive beneath wp-content/uploads, while extension control overlooks dot-prefixed PHP filenames during a race window. No account is required; invoking the temporary PHP file executes commands with the WordPress server process's privileges.

CVSS severity8.1
High
EPSS probability83.35%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in BrandExponents Tatsu before 3.3.12 allows remote attackers to execute PHP code via a crafted ZIP upload. The unauthenticated add_custom_font AJAX action extracts an uploaded archive beneath wp-content/uploads, while extension control overlooks dot-prefixed PHP filenames during a race window. No account is required; invoking the temporary PHP file executes commands with the WordPress server process's privileges.

The record

CVE
CVE-2021-25094
Published
Apr 25, 2022
Updated
Apr 21, 2025
Vendor
BrandExponents
Product
Tatsu
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.3.12 <3.3.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BrandExponents · Tatsuversion=3.3.12 <3.3.12

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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