CVE-2021-20689: Cross-site scripting vulnerability in Yomi-Search Ver4.22 allows remote attackers to inject an arbitrary scrip

Routine

MEDIUM 6.1DOWNGRADE

CVE-2021-20689 is a medium-severity flaw (CVSS 6.1) affecting yomi-search. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting vulnerability in Yomi-Search Ver4.22 allows remote attackers to inject an arbitrary script via unspecified vectors.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-04-07
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: yomi-search project

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

Am I affected?

Timeline

2021-04-07 08:15 UTCPublished CVE record published
2026-06-17 03:34 UTCUpdated Record last modified

yomi-search project yomi-search DOWNGRADE

Affected: 4.22

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.22

1. Check installed version

apt-cache policy yomi-search || rpm -q yomi-search || yomi-search --version

2. No fixed release: DOWNGRADE to a release before 4.22 (Debian / Ubuntu)

apt-cache madison yomi-search sudo apt install yomi-search=<VERSION_BEFORE_4.22> sudo apt-mark hold yomi-search

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

dnf --showduplicates list yomi-search sudo dnf downgrade yomi-search-<VERSION_BEFORE_4.22> sudo dnf versionlock add yomi-search

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-2021-20689?

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

Is CVE-2021-20689 being exploited?

CVE-2021-20689 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-2021-20689 affect?

CVE-2021-20689 affects yomi-search. Severity is medium (CVSS 6.1). Cross-site scripting vulnerability in Yomi-Search Ver4.22 allows remote attackers to inject an arbitrary script via unspecified vectors.

How urgent is CVE-2021-20689?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2021-20691 MEDIUM 6.1 DOWNGRADE Cross-site scripting vulnerability in Yomi-Search Ver4.22 allows remote attackers to inject an arbitrary scrip
CVE-2021-20690 MEDIUM 6.1 DOWNGRADE Cross-site scripting vulnerability in Yomi-Search Ver4.22 allows remote attackers to inject an arbitrary scrip

References

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