CVE-2020-36847Simple File List Unrestricted File Upload
The Simple-File-List Plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 4.2.2 via the rename function which can be used to rename uploaded PHP code with a png extension to use a php extension.
Published Jul 12, 2025 · Updated Apr 8, 2026 · Also known as 9eb835fd-6ebf-4162-856c-0366b663a07e, WORDFENCE-9eb835fd-6ebf-4162-856c-0366b663a07e
Key Facts
Patch immediately- CVE-2020-36847 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Simple File List (Simplefilelist).
- It is exploited in the wild, listed in Industry KEV feed since Jun 23, 2026. Public exploit code is available.
- EPSS estimates a 44% probability of exploitation in the next 30 days.
- Fixed versions are available, including Simple File List 4.2.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
44%
Higher than 98.7% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
65/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jun 23, 2026
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
5
Reports of active use
Advisories And Exploit References
- advisoryhttps://www.cybersecurity-help.cz/vdb/SB2020042711
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/9eb835fd-6ebf-4162-856c-0366b663a07e?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/9eb835fd-6ebf-4162-856c-0366b663a07e?source=api-scan
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/9eb835fd-6ebf-4162-856c-0366b663a07e?source=cve
- patchhttps://plugins.trac.wordpress.org/changeset/2286920/simple-file-list
Description
The Simple-File-List Plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 4.2.2 via the rename function which can be used to rename uploaded PHP code with a png extension to use a php extension. This allows unauthenticated attackers to execute code on the server.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jun 23, 2026 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Simple File ListSimplefilelist | See advisory | 4.2.3 |
Patched Releases
Simple File List
4.2.3
Timeline
Publicly disclosed
Jul 12, 2025
Last updated
Apr 8, 2026
Added to Industry KEV feed
Jun 23, 2026
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- advisorycybersecurity-help.cz · SB2020042711
- advisorywordfence.com · 9eb835fd-6ebf-4162-856c-0366b663a07e
- advisorywordfence.com · 9eb835fd-6ebf-4162-856c-0366b663a07e
- advisorywordfence.com · 9eb835fd-6ebf-4162-856c-0366b663a07e
- patchplugins.trac.wordpress.org · simple-file-list
FAQ
Common Questions.
The Simple-File-List Plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 4.2.2 via the rename function which can be used to rename uploaded PHP code with a png extension to use a php extension.
Affected: Simple File List (Simplefilelist). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jun 23, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Simple File List 4.2.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2020-36847 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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