CVE-2020-8954: OpenSearch Web browser 1.0.4.9 allows Intent Scheme Hijacking.[a link that opens another app in the browser ca

Routine

MEDIUM 5.4DOWNGRADE

CVE-2020-8954 is a medium-severity flaw (CVSS 5.4) affecting openbrowser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenSearch Web browser 1.0.4.9 allows Intent Scheme Hijacking.[a link that opens another app in the browser can be manipulated]

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-276
Published	2020-06-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openbrowser project

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

Am I affected?

Timeline

2020-06-08 17:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

openbrowser project openbrowser DOWNGRADE

Affected: 1.0.4.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.4.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.4.9 (Debian / Ubuntu)

apt-cache madison openbrowser sudo apt install openbrowser=<VERSION_BEFORE_1.0.4.9> sudo apt-mark hold openbrowser

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

dnf --showduplicates list openbrowser sudo dnf downgrade openbrowser-<VERSION_BEFORE_1.0.4.9> sudo dnf versionlock add openbrowser

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-2020-8954?

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

Is CVE-2020-8954 being exploited?

CVE-2020-8954 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-2020-8954 affect?

CVE-2020-8954 affects openbrowser. Severity is medium (CVSS 5.4). OpenSearch Web browser 1.0.4.9 allows Intent Scheme Hijacking.[a link that opens another app in the browser can be manipulated]

How urgent is CVE-2020-8954?

Priority 33/100. No elevated risk signals yet.

References

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