CVE-2020-5514Public exploitNetwork attack vector

Authenticated remote code execution via unsafe thumbnail fetch

Published Jan 6, 2020 · Updated Aug 4, 2024

Dangerous file upload in Gila CMS 1.11.8 allows remote authenticated users to execute code through the lzld/thumb endpoint. The thumbnail handler passes the src URL through image::make_thumb and image::local_path, then PHP copy saves the remote content under a derived name without validating its type. Administrator access and a web server configured to execute .phar or .phtml files are required, after which arbitrary system commands run in the web server context.

CVSS severity9.1
Critical
EPSS probability44.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Dangerous file upload in Gila CMS 1.11.8 allows remote authenticated users to execute code through the lzld/thumb endpoint. The thumbnail handler passes the src URL through image::make_thumb and image::local_path, then PHP copy saves the remote content under a derived name without validating its type. Administrator access and a web server configured to execute .phar or .phtml files are required, after which arbitrary system commands run in the web server context.

The record

CVE
CVE-2020-5514
Published
Jan 6, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

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.

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

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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