HOMEVULNERABILITIESCVE-2020-11707
HIGH

CVE-2020-11707

CWE-863Published: April 12, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

An issue was discovered in ProVide (formerly zFTPServer) through 13.1. It doesn't enforce permission over Windows Symlinks or Junctions. As a result, a low-privileged user (non-admin) can craft a Junction Link in a directory he has full control of, breaking out of the sandbox.

NVD Source

Technical Analysis

CVE-2020-11707 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), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

provideserver1 product(s)
provide ftp server
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

ADVISORYhttps://github.com/belong2yourself/vulnerabilities/tree/master/ProVide/Sandbox%20Escape%20via%20Symlink%20or%20Junction
ADVISORYhttps://www.provideserver.com/security/
ADVISORYhttps://github.com/belong2yourself/vulnerabilities/tree/master/ProVide/Sandbox%20Escape%20via%20Symlink%20or%20Junction
ADVISORYhttps://www.provideserver.com/security/

All References (4)

→
https://github.com/belong2yourself/vulnerabilities/tree/master/ProVide/Sandbox%20Escape%20via%20Symlink%20or%20JunctionExploit · Third Party Advisory
→
https://www.provideserver.com/security/Vendor Advisory
→
https://github.com/belong2yourself/vulnerabilities/tree/master/ProVide/Sandbox%20Escape%20via%20Symlink%20or%20JunctionExploit · Third Party Advisory
→
https://www.provideserver.com/security/Vendor Advisory

Quick Facts

CVE IDCVE-2020-11707
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-863
CISA KEVNo
Affected1 vendor(s)
PublishedApr 12, 2020

Related CVEs (CWE-863)

CVE-2023-4617
10.0
CVE-2020-13300
10.0
CVE-2026-48321
10.0
CVE-2021-38503
10.0
CVE-2026-48303
10.0
CVE-2026-48286
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-11707 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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