CVE-2020-2524: Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: InQuira Search)

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MEDIUM 5.9REMOTEUPGRADE

CVE-2020-2524 is a medium-severity flaw (CVSS 5.9) affecting knowledge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: InQuira Search). Supported versions that are affected are 8.6.0-8.6.3. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Knowledge. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Knowledge. CVSS 3.0 Base

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Published	2020-04-15
Last modified	2026-06-17

Publisher (CNA): Oracle · Vendor: oracle

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

Am I affected?

Timeline

2020-04-15 14:15 UTCPublished CVE record published
2026-06-17 03:12 UTCUpdated Record last modified

oracle knowledge UPGRADE

Affected: >= 8.6.0 and <= 8.6.3

Fixed in: newer than 8.6.3

Safe to downgrade to: a release before 8.6.0

1. Check installed version

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

2. UPGRADE to newer than 8.6.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade knowledge

Note

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

3. If no update is available yet, DOWNGRADE to a release before 8.6.0 (Debian / Ubuntu)

apt-cache madison knowledge sudo apt install knowledge=<VERSION_BEFORE_8.6.0> sudo apt-mark hold knowledge

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list knowledge sudo dnf downgrade knowledge-<VERSION_BEFORE_8.6.0> sudo dnf versionlock add knowledge

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-2020-2524?

knowledge: upgrade to newer than 8.6.3. Exact commands for each OS are on this page.

Is CVE-2020-2524 being exploited?

CVE-2020-2524 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-2020-2524 affect?

CVE-2020-2524 affects knowledge. Severity is medium (CVSS 5.9). Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: InQuira Search). Supported versions that are affected are 8.6.0-8.6.3. Difficult to exploit vulnerability allows unauthenticated attacker with network access via

How urgent is CVE-2020-2524?

Priority 44/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-2932 MEDIUM 5.9 UPGRADE Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: Information Manager Console)
CVE-2020-2931 CRITICAL 9.8 UPGRADE Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: Web Applications - InfoCenter)
CVE-2020-2795 MEDIUM 6.3 UPGRADE Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: Information Manager Console)
CVE-2020-2791 CRITICAL 9.8 UPGRADE Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: Information Manager Console)
CVE-2020-2553 MEDIUM 4.8 UPGRADE Vulnerability in the Oracle Knowledge product of Oracle Knowledge (component: Information Manager Console)

References

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