CVE-2026-55695Public exploitNetwork attack vectorHinoki check available

Administrator-level code execution via unvalidated update repository

Published Oct 13, 2026 · Updated Oct 13, 2026

Code injection in FearlessCMS before 0.1.3b allows remote authenticated users to execute PHP via the system updater's repository URL. In Fearless Geek Media's CMS, admin/updater-handler.php passes an administrator-supplied URL to update.sh, which clones unverified content and replaces live plugins/, admin/, and includes/ directories. Administrator access is required; router.php lets the PHP development server execute planted plugin PHP files with web server process privileges, enabling persistent backdoors.

CVSS severity9.1
Critical
EPSS probability0.46%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Code injection in FearlessCMS before 0.1.3b allows remote authenticated users to execute PHP via the system updater's repository URL. In Fearless Geek Media's CMS, admin/updater-handler.php passes an administrator-supplied URL to update.sh, which clones unverified content and replaces live plugins/, admin/, and includes/ directories. Administrator access is required; router.php lets the PHP development server execute planted plugin PHP files with web server process privileges, enabling persistent backdoors.

The record

CVE
CVE-2026-55695
Published
Oct 13, 2026
Updated
Oct 13, 2026
Vendor
Fearless Geek Media
Product
FearlessCMS
Classifications
CWE-94, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 0.1.3b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Fearless Geek Media · FearlessCMSversion=< 0.1.3b

Published CVSS scores

9.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1505.003Server Software Component: Web Shell

Public exploit references

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

Technologies

Your stack

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Your stack

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