CVE-2023-2979: A vulnerability classified as critical has been found in Abstrium Pydio Cells 4.2.0

Routine

MEDIUM 4.7DOWNGRADE

CVE-2023-2979 is a medium-severity flaw (CVSS 4.7) affecting pydio cells. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as critical has been found in Abstrium Pydio Cells 4.2.0. This affects an unknown part of the component User Creation Handler. The manipulation leads to improper access controls. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 4.2.1 is able to address this issue. It is recommended to upgrade the affected component. The associated identifi

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-284
Published	2023-05-30
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: abstrium

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-30 14:15 UTCPublished CVE record published
2026-06-17 05:53 UTCUpdated Record last modified

abstrium pydio cells DOWNGRADE

Affected: 4.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2.0

1. Check installed version

apt-cache policy pydio-cells || rpm -q pydio-cells || pydio-cells --version

2. No fixed release: DOWNGRADE to a release before 4.2.0 (Debian / Ubuntu)

apt-cache madison pydio-cells sudo apt install pydio-cells=<VERSION_BEFORE_4.2.0> sudo apt-mark hold pydio-cells

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pydio-cells sudo dnf downgrade pydio-cells-<VERSION_BEFORE_4.2.0> sudo dnf versionlock add pydio-cells

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-2979?

pydio cells: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-2979 being exploited?

CVE-2023-2979 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-2979 affect?

CVE-2023-2979 affects pydio cells. Severity is medium (CVSS 4.7). A vulnerability classified as critical has been found in Abstrium Pydio Cells 4.2.0. This affects an unknown part of the component User Creation Handler. The manipulation leads to improper access controls. It is possible to initiate the att

How urgent is CVE-2023-2979?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2023-2981 LOW 3.5 DOWNGRADE A vulnerability, which was classified as problematic, has been found in Abstrium Pydio Cells 4.2.0
CVE-2023-2980 MEDIUM 6.3 DOWNGRADE A vulnerability classified as critical was found in Abstrium Pydio Cells 4.2.0
CVE-2023-2978 MEDIUM 4.6 DOWNGRADE A vulnerability was found in Abstrium Pydio Cells 4.2.0

References

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