A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later interactions and usage with those rules
Published Jan 26, 2021
6.5
MEDIUMCVSS 3.1
EPSS 1.56%
Description
A missing input validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows users to store unlimited data in workflow rules causing load and potential DDoS on later interactions and usage with those rules.
Affected products
- Vendor n/a Product Nextcloud Server Defaultn/a
- Version Fixed in 20.0.2, 19.0.5, 18.0.11StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Nextcloud Server | n/a |
|
- < 18.0.11
- ≥ 19.0.0 · < 19.0.5
- ≥ 20.0.0 · < 20.0.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.56% (0.01557) | 74.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.56% (0.01557) | 71.88th | v5 (v2026.06.15) |
| May 1, 2025 | 0.51% (0.00514) | 65.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.86% (0.01864) | 72.04th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.08% (0.00081) | 35.33th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.08% (0.00081) | 35.08th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00081) | 33.07th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- https://hackerone.com/reports/1018146 x_refsource_MISCThird Party Advisory
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-001 x_refsource_MISCBroken LinkVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://hackerone.com/reports/1018146 | x_refsource_MISCThird Party Advisory | |
| https://nextcloud.com/security/advisory/?id=NC-SA-2021-001 | x_refsource_MISCBroken LinkVendor Advisory |
Change history (0)
No recorded changes yet.