MEDIUM
CVE-2020-8118
CWE-918Published: February 4, 2020· Updated: Jun 17, 2026
5.0
CVSS v3.1
Official Description
An authenticated server-side request forgery in Nextcloud server 16.0.1 allowed to detect local and remote services when adding a new subscription in the calendar application.
Technical Analysis
CVE-2020-8118 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.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeChanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Affected Vendors & Products
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
All References (8)
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.htmlRelease Notes · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.htmlRelease Notes · Third Party Advisory
→
https://hackerone.com/reports/427835Exploit · Third Party Advisory
→
https://nextcloud.com/security/advisory/?id=NC-SA-2019-014Vendor Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.htmlRelease Notes · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.htmlRelease Notes · Third Party Advisory
→
https://hackerone.com/reports/427835Exploit · Third Party Advisory
→
https://nextcloud.com/security/advisory/?id=NC-SA-2019-014Vendor Advisory
Quick Facts
CVE IDCVE-2020-8118
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-918
CISA KEVNo
Affected3 vendor(s)
PublishedFeb 4, 2020
Related CVEs (CWE-918)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-8118 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.COM. CVE data is provided under the NVD usage policy.