Is CVE-2021-47976 actively exploited?

No active exploitation of CVE-2021-47976 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-47976 be exploited remotely?

Yes. CVE-2021-47976 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-47976?

CVE-2021-47976 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2021-47976

CWE-352Published: May 16, 2026· Updated: May 18, 2026

8.8

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:26.4th

Official 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.

NVD Source

Technical Analysis

CVE-2021-47976 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.