CVE-2020-8122: nextcloud nextcloud_server Improper Access Control
CVSS: 4.3v3.1MediumModified
Published 04-02-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-8122 is a medium (CVSS 4.3) Improper Access Control vulnerability in nextcloud nextcloud_server. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.7% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
4.3/10
010
Medium · v3.1 (NVD)EPSS score
0.68%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 04-02-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A missing check in Nextcloud Server 14.0.3 could give recipient the possibility to extend the expiration date of a share they received.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 4.3Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NSourcesSingle source
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
0.68%
Chance of exploitation in the next 30 days
Percentile
52%
Versus all other CVEs
30-day change
0.00 pp
From 0.68% on 19-09-2026
19-09-202619-10-2026
EPSS score0.68%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Affected systems
Nextcloud1 product
- nextcloud_server< 12.0.13 | ≥ 13.0.0, < 13.0.8 | ≥ 14.0.0, < 14.0.4 | ≥ 14.0.5, < 15.0.0
1 vendor · 1 product