CVE-2021-27940: resources/public/js/orchestrator.js in openark orchestrator before 3.2.4 allows XSS via the orchestrator-msg p

Q: How do I fix CVE-2021-27940?

orchestrator: upgrade to 3.2.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-27940 being exploited?

CVE-2021-27940 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-27940 affect?

CVE-2021-27940 affects orchestrator. Severity is medium (CVSS 6.1). resources/public/js/orchestrator.js in openark orchestrator before 3.2.4 allows XSS via the orchestrator-msg parameter.

Q: How urgent is CVE-2021-27940?

Priority 44/100. Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2021-27940 is a medium-severity flaw (CVSS 6.1) affecting orchestrator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

resources/public/js/orchestrator.js in openark orchestrator before 3.2.4 allows XSS via the orchestrator-msg parameter.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-03-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openark

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

Am I affected?

Timeline

2021-03-03 22:15 UTCPublished CVE record published
2026-06-17 03:45 UTCUpdated Record last modified

openark orchestrator UPGRADE

Affected: < 3.2.4

Fixed in: 3.2.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.2.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade orchestrator

Note

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

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-2021-27940?

orchestrator: upgrade to 3.2.4. Exact commands for each OS are on this page.

Is CVE-2021-27940 being exploited?

CVE-2021-27940 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-2021-27940 affect?

CVE-2021-27940 affects orchestrator. Severity is medium (CVSS 6.1). resources/public/js/orchestrator.js in openark orchestrator before 3.2.4 allows XSS via the orchestrator-msg parameter.

How urgent is CVE-2021-27940?

Priority 44/100. Public exploit reference

Related CVEs

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CVE-2018-17305 HIGH 8.8 UPGRADE UiPath Orchestrator through 2018.2.4 allows any authenticated user to change the information of arbitrary user

References

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