CVE-2020-10557Public exploitNetwork attack vector

Authenticated command execution via .php7 upload bypass

Published Mar 16, 2020 · Updated Aug 4, 2024

Unrestricted file upload in AContent 1.4 and earlier allows remote authenticated users to execute server commands via a crafted .php7 file. AContent's file-manager upload.php accepts .php7 and .phtml files because the default illegal-extension list omits them, leaving uploaded PHP code web-accessible. Open registration permits a low-privileged account to create a course and upload a web shell, enabling command execution on the server.

CVSS severity8.8
High
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in AContent 1.4 and earlier allows remote authenticated users to execute server commands via a crafted .php7 file. AContent's file-manager upload.php accepts .php7 and .phtml files because the default illegal-extension list omits them, leaving uploaded PHP code web-accessible. Open registration permits a low-privileged account to create a course and upload a web shell, enabling command execution on the server.

The record

CVE
CVE-2020-10557
Published
Mar 16, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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