HOMEVULNERABILITIESCVE-2020-12851
HIGH

CVE-2020-12851

CWE-22Published: June 4, 2020· Updated: Jun 17, 2026

8.1
CVSS v3.1

Official Description

Pydio Cells 2.0.4 allows an authenticated user to write or overwrite existing files in another user’s personal and cells folders (repositories) by uploading a custom generated ZIP file and leveraging the file extraction feature present in the web application. The extracted files will be placed in the targeted user folders.

NVD Source

Technical Analysis

CVE-2020-12851 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

pydio1 product(s)
cells
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://packetstormsecurity.com/files/158002/Pydio-Cells-2.0.4-XSS-File-Write-Code-Execution.html
ADVISORYhttps://www.coresecurity.com/advisories
ADVISORYhttps://www.coresecurity.com/core-labs/advisories/pydio-cells-204-multiple-vulnerabilities
ADVISORYhttp://packetstormsecurity.com/files/158002/Pydio-Cells-2.0.4-XSS-File-Write-Code-Execution.html
ADVISORYhttps://www.coresecurity.com/advisories
ADVISORYhttps://www.coresecurity.com/core-labs/advisories/pydio-cells-204-multiple-vulnerabilities

All References (6)

→
http://packetstormsecurity.com/files/158002/Pydio-Cells-2.0.4-XSS-File-Write-Code-Execution.htmlThird Party Advisory
→
https://www.coresecurity.com/advisoriesThird Party Advisory
→
https://www.coresecurity.com/core-labs/advisories/pydio-cells-204-multiple-vulnerabilitiesExploit · Third Party Advisory
→
http://packetstormsecurity.com/files/158002/Pydio-Cells-2.0.4-XSS-File-Write-Code-Execution.htmlThird Party Advisory
→
https://www.coresecurity.com/advisoriesThird Party Advisory
→
https://www.coresecurity.com/core-labs/advisories/pydio-cells-204-multiple-vulnerabilitiesExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-12851
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-22
CISA KEVNo
Affected1 vendor(s)
PublishedJun 4, 2020

Related CVEs (CWE-22)

CVE-2009-0841
10.0
CVE-2010-4229
10.0
CVE-2007-5005
10.0
CVE-2007-5364
10.0
CVE-2009-1161
10.0
CVE-2011-1900
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-12851 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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