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CVE Record

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

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.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2021-25094 affects the Tatsu WordPress plugin before 3.3.12. An unauthenticated attacker could upload a crafted zip that briefly places executable PHP under WordPress uploads, enabling remote code execution. For a public WordPress site using Tatsu, this can mean site takeover. Exposure is most likely on internet-facing WordPress sites with Tatsu installed below version 3.3.12. The bundle does not identify specific themes, hosting providers, or default install prevalence. Treat this as urgent for any public WordPress property using Tatsu. Unauthenticated remote code execution can quickly become website compromise, data exposure, malware hosting, or customer-facing defacement. Mitigation focus: Upgrade Tatsu to 3.3.12 or later where vendor guidance confirms the fix.; Disable or remove Tatsu until the site is confirmed patched.; Review WordPress uploads for unexpected executable PHP files..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · medium confidence lookup

CWE-306: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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Execution behavior lookup

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cve · low confidence lookup

CVE-2021-25094 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
UnknownTatsu3.3.12Listed
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-306 · source CWE mapping

Missing Authentication for Critical Function

Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.