Is CVE-2021-47900 actively exploited?

No active exploitation of CVE-2021-47900 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-47900 be exploited remotely?

Yes. CVE-2021-47900 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-47900?

CVE-2021-47900 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-47900

CWE-98Published: January 27, 2026· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Gila CMS versions prior to 2.0.0 contain a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary system commands through manipulated HTTP headers. Attackers can inject PHP code in the User-Agent header with shell_exec() to run system commands by sending crafted requests to the admin endpoint.

NVD Source

Risk Analysis

Gila CMS is susceptible to remote code execution because it fails to properly sanitize HTTP headers. An unauthenticated attacker can inject PHP code into the User-Agent header to execute system commands, justifying its critical CVSS score of 9.8.

There is no known public exploit, and the vulnerability is not in the KEV database.

Recommended Action

Upgrade Gila CMS to version 2.0.0 or later to remediate the vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-47900 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.