CVE-2021-27312Public exploitNetwork attack vector

Unauthenticated code execution via external URL proxying

Published Apr 3, 2024 · Updated Aug 28, 2024

SSRF in Gleez CMS 1.2.0 allows remote attackers to execute arbitrary code or obtain sensitive information through a crafted URL path. Request::factory passes the path to a constructor whose allow_external parameter defaults to true, causing URLs containing :// to be fetched through cURL. No authentication is required; code execution depends on a reachable service such as PHP-FPM or Redis that accepts a cURL-supported protocol.

CVSS severity9.4
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Gleez CMS 1.2.0 allows remote attackers to execute arbitrary code or obtain sensitive information through a crafted URL path. Request::factory passes the path to a constructor whose allow_external parameter defaults to true, causing URLs containing :// to be fetched through cURL. No authentication is required; code execution depends on a reachable service such as PHP-FPM or Redis that accepts a cURL-supported protocol.

The record

CVE
CVE-2021-27312
Published
Apr 3, 2024
Updated
Aug 28, 2024
Vendor
Gleez Technologies
Product
Gleez CMS
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2024Record 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=1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gleez Technologies · Gleez CMSversion=1.2.0

Published CVSS scores

9.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

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.

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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 exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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