CVE-2020-11807Public exploitNetwork attack vector

Authenticated PHP code execution via avatar upload

Published May 19, 2020 · Updated Aug 4, 2024

Unrestricted file upload in Sourcefabric Newscoop 4.4.7 allows remote authenticated users to execute arbitrary PHP code via an avatar update. The avatar image handler stores attacker-supplied files under the web-accessible /images/ path without restricting dangerous PHP types, so requesting the uploaded avatar causes server-side execution and can enable terminal commands. An authenticated account is required, and successful exploitation can compromise confidentiality, integrity, and availability of the Newscoop server.

CVSS severity7.8
High
EPSS probability0.65%
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 Sourcefabric Newscoop 4.4.7 allows remote authenticated users to execute arbitrary PHP code via an avatar update. The avatar image handler stores attacker-supplied files under the web-accessible /images/ path without restricting dangerous PHP types, so requesting the uploaded avatar causes server-side execution and can enable terminal commands. An authenticated account is required, and successful exploitation can compromise confidentiality, integrity, and availability of the Newscoop server.

The record

CVE
CVE-2020-11807
Published
May 19, 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. May 19, 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

4.6NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.8NVDCVSS:3.1/AV:L/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
T1505.003Web 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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