CVE-2015-7298: ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply

Routine

MEDIUM 5.1UPGRADEDOWNGRADE

CVE-2015-7298 is a medium-severity flaw (CVSS 5.1) affecting owncloud desktop client, qt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply::ignoreSslErrors with the list of errors to be ignored, which makes it easier for remote attackers to conduct man-in-the-middle (MITM) attacks by leveraging a server using a self-signed certificate. NOTE: this vulnerability exists because of a partial CVE-2015-4456 regression.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Published	2015-10-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: owncloud · qt

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

Am I affected?

Timeline

2015-10-26 14:59 UTCPublished CVE record published
2026-06-17 00:32 UTCUpdated Record last modified

owncloud owncloud desktop client UPGRADE

Affected: <= 2.0.0

Fixed in: newer than 2.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade owncloud-desktop-client

Note

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

qt qt DOWNGRADE

Affected: 5.3.0 · 5.4.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.3.0 (Debian / Ubuntu)

apt-cache madison qt sudo apt install qt=<VERSION_BEFORE_5.3.0> sudo apt-mark hold qt

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

dnf --showduplicates list qt sudo dnf downgrade qt-<VERSION_BEFORE_5.3.0> sudo dnf versionlock add qt

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-2015-7298?

owncloud desktop client: upgrade to newer than 2.0.0; qt: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-7298 being exploited?

CVE-2015-7298 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-2015-7298 affect?

CVE-2015-7298 affects owncloud desktop client, qt. Severity is medium (CVSS 5.1). ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply::ignoreSslErrors with the list of errors to be ignored, which makes it easier for remote attackers to conduct man-in-the-middle (

How urgent is CVE-2015-7298?

Priority 31/100. No elevated risk signals yet.

Software pages

ownCloud vulnerabilities

Related CVEs

CVE-2021-44537 HIGH 7.8 UPGRADE MITIGATE ownCloud owncloud/client before 2.9.2 allows Resource Injection by a server into the desktop client via a URL,
CVE-2020-28646 HIGH 7.8 UPGRADE ownCloud owncloud/client before 2.7 allows DLL Injection
CVE-2016-7102 HIGH 8.4 UPGRADE ownCloud Desktop before 2.2.3 allows local users to execute arbitrary code and possibly gain privileges via a
CVE-2015-4456 LOW 2.6 UPGRADE ownCloud Desktop Client before 1.8.2 does not call QNetworkReply::ignoreSslErrors with the list of errors to b

References

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