9.1

CVE-2020-28645: owncloud Improper Input Validation

CVSS: 9.1v3.1CriticalModified
Published 09-02-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-28645 is a critical (CVSS 9.1) Improper Input Validation vulnerability in owncloud. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
1.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-02-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions < 10.6.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.24%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

0.00 pp

From 1.24% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Owncloud1 product

1 vendor · 1 product

References

1 links