CVE-2021-35949: The shareinfo controller in the ownCloud Server before 10.8.0 allows an attacker to bypass the permission chec

Q: How do I fix CVE-2021-35949?

owncloud: upgrade to 10.8.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-35949 being exploited?

CVE-2021-35949 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-35949 affect?

CVE-2021-35949 affects owncloud. Severity is medium (CVSS 5.3). The shareinfo controller in the ownCloud Server before 10.8.0 allows an attacker to bypass the permission checks for upload only shares and list metadata about the share.

Q: How urgent is CVE-2021-35949?

Priority 39/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2021-35949 is a medium-severity flaw (CVSS 5.3) affecting owncloud. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The shareinfo controller in the ownCloud Server before 10.8.0 allows an attacker to bypass the permission checks for upload only shares and list metadata about the share.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-863
Published	2021-09-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: owncloud

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

Am I affected?

Timeline

2021-09-07 19:15 UTCPublished CVE record published
2026-06-17 03:57 UTCUpdated Record last modified

owncloud owncloud UPGRADE

Affected: < 10.8.0

Fixed in: 10.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy owncloud || rpm -q owncloud || owncloud --version

2. UPGRADE to 10.8.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade owncloud

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade owncloud

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2021-35949?

owncloud: upgrade to 10.8.0. Exact commands for each OS are on this page.

Is CVE-2021-35949 being exploited?

CVE-2021-35949 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-2021-35949 affect?

CVE-2021-35949 affects owncloud. Severity is medium (CVSS 5.3). The shareinfo controller in the ownCloud Server before 10.8.0 allows an attacker to bypass the permission checks for upload only shares and list metadata about the share.

How urgent is CVE-2021-35949?

Priority 39/100. Remotely exploitable, no login, no user action

Software pages

ownCloud vulnerabilities

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CVE-2021-35946 CRITICAL 9.8 UPGRADE A receiver of a federated share with access to the database with ownCloud version before 10.8 could update the

References

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