CVE-2020-8228: A missing rate limit in the Preferred Providers app 1.7.0 allowed an attacker to set the password an uncontrol

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MEDIUM 5.3REMOTEDOWNGRADEDOWNGRADEMITIGATE

CVE-2020-8228 is a medium-severity flaw (CVSS 5.3) affecting preferred providers, backports sle, leap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A missing rate limit in the Preferred Providers app 1.7.0 allowed an attacker to set the password an uncontrolled amount of times.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-840, CWE-307
Published	2020-10-05
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: nextcloud · opensuse

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

Am I affected?

Timeline

2020-10-05 14:15 UTCPublished CVE record published
2026-06-17 03:26 UTCUpdated Record last modified

nextcloud preferred providers DOWNGRADE

Affected: 1.7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.7.0

1. Check installed version

apt-cache policy preferred-providers || rpm -q preferred-providers || preferred-providers --version

2. No fixed release: DOWNGRADE to a release before 1.7.0 (Debian / Ubuntu)

apt-cache madison preferred-providers sudo apt install preferred-providers=<VERSION_BEFORE_1.7.0> sudo apt-mark hold preferred-providers

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

dnf --showduplicates list preferred-providers sudo dnf downgrade preferred-providers-<VERSION_BEFORE_1.7.0> sudo dnf versionlock add preferred-providers

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.

opensuse backports sle DOWNGRADE

Affected: 15.0 sp1 · 15.0 sp2

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.0

1. Check installed version

apt-cache policy backports-sle || rpm -q backports-sle || backports-sle --version

2. No fixed release: DOWNGRADE to a release before 15.0 (Debian / Ubuntu)

apt-cache madison backports-sle sudo apt install backports-sle=<VERSION_BEFORE_15.0> sudo apt-mark hold backports-sle

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

dnf --showduplicates list backports-sle sudo dnf downgrade backports-sle-<VERSION_BEFORE_15.0> sudo dnf versionlock add backports-sle

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.

opensuse leap MITIGATE

Affected: 15.1 · 15.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2020-8228?

preferred providers: downgrade or apply the listed mitigation; backports sle: downgrade or apply the listed mitigation; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-8228 being exploited?

CVE-2020-8228 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-2020-8228 affect?

CVE-2020-8228 affects preferred providers, backports sle, leap. Severity is medium (CVSS 5.3). A missing rate limit in the Preferred Providers app 1.7.0 allowed an attacker to set the password an uncontrolled amount of times.

How urgent is CVE-2020-8228?

Priority 48/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Nextcloud vulnerabilities

Related CVEs

CVE-2020-8202 MEDIUM 5.3 DOWNGRADE Improper check of inputs in Nextcloud Preferred Providers app v1.6.0 allowed to perform a denial of service at

References

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