CVE-2021-31682: The login portal for the Automated Logic WebCTRL/WebCTRL OEM web application contains a vulnerability that all

Q: How do I fix CVE-2021-31682?

webctrl: upgrade to newer than 6.5. Exact commands for each OS are on this page.

Q: Is CVE-2021-31682 being exploited?

CVE-2021-31682 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-2021-31682 affect?

CVE-2021-31682 affects webctrl. Severity is medium (CVSS 6.1). The login portal for the Automated Logic WebCTRL/WebCTRL OEM web application contains a vulnerability that allows for reflected XSS attacks due to the operatorlocale GET parameter not being sanitized. This issue impacts versions 6.5 and bel

Q: How urgent is CVE-2021-31682?

Priority 50/100. EPSS top 4%: very likely to be exploited; Public exploit reference

This week

MEDIUM 6.1UPGRADE

CVE-2021-31682 is a medium-severity flaw (CVSS 6.1) affecting webctrl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The login portal for the Automated Logic WebCTRL/WebCTRL OEM web application contains a vulnerability that allows for reflected XSS attacks due to the operatorlocale GET parameter not being sanitized. This issue impacts versions 6.5 and below. This issue works by passing in a basic XSS payload to a vulnerable GET parameter that is reflected in the output without sanitization.

Why this priority

EPSS top 4%: very likely to be exploited
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	10.5% (top 4%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-10-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: automatedlogic

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

Am I affected?

Timeline

2021-10-22 12:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

automatedlogic webctrl UPGRADE

Affected: <= 6.5

Fixed in: newer than 6.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 6.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade webctrl

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WebCTRL OEM 6.5 - 'locale' Reflected Cross-Site Scripting (XSS)
Nuclei scan template: WebCTRL OEM <= 6.5 - Cross-Site Scripting

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-2021-31682?

webctrl: upgrade to newer than 6.5. Exact commands for each OS are on this page.

Is CVE-2021-31682 being exploited?

CVE-2021-31682 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-2021-31682 affect?

CVE-2021-31682 affects webctrl. Severity is medium (CVSS 6.1). The login portal for the Automated Logic WebCTRL/WebCTRL OEM web application contains a vulnerability that allows for reflected XSS attacks due to the operatorlocale GET parameter not being sanitized. This issue impacts versions 6.5 and bel

How urgent is CVE-2021-31682?

Priority 50/100. EPSS top 4%: very likely to be exploited; Public exploit reference

References

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