How severe is CVE-2020-12851?

CVE-2020-12851 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-12851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12851?

CVE-2020-12851 affects Pydio Cells. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-12851 published?

CVE-2020-12851 was published on 2020-06-04 and last updated on 2026-06-17.

CVE-2020-12851

CVE-2020-12851 is a high-severity vulnerability in Pydio Cells with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Pydio Cells
Published: 2020-06-04
Last modified: 2026-06-17

Description

Pydio Cells 2.0.4 allows an authenticated user to write or overwrite existing files in another user’s personal and cells folders (repositories) by uploading a custom generated ZIP file and leveraging the file extraction feature present in the web application. The extracted files will be placed in the targeted user folders.

Frequently asked questions

What is CVE-2020-12851?: Pydio Cells 2.0.4 allows an authenticated user to write or overwrite existing files in another user’s personal and cells folders (repositories) by uploading a custom generated ZIP file and leveraging the file extraction feature present in the web application. The extracted files will be placed in the targeted user folders.
How severe is CVE-2020-12851?: CVE-2020-12851 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-12851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12851?: CVE-2020-12851 affects Pydio Cells. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-12851 published?: CVE-2020-12851 was published on 2020-06-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pydio:cells:2.0.4:*:*:*:*:*:*:*

More vulnerabilities in Pydio Cells

CVE-2023-32749 — High (CVSS 8.8): Pydio Cells allows users by default to create so-called external users in order to share files with them. By modifying…
CVE-2019-12901 — High (CVSS 8.8): Pydio Cells before 1.5.0 fails to neutralize '../' elements, allowing an attacker with minimum privilege to Upload…
CVE-2020-12847 — High (CVSS 7.2): Pydio Cells 2.0.4 web application offers an administrative console named “Cells Console” that is available to users…
CVE-2020-12850 — High (CVSS 7.0): The following vulnerability applies only to the Pydio Cells Enterprise OVF version 2.0.4. Prior versions of the Pydio…
CVE-2020-12852 — Medium (CVSS 6.8): The update feature for Pydio Cells 2.0.4 allows an administrator user to set a custom update URL and the public RSA key…
CVE-2023-32750 — Medium (CVSS 6.5): Pydio Cells through 4.1.2 allows SSRF. For longer running processes, Pydio Cells allows for the creation of jobs, which…

All CVEs affecting Pydio Cells →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →