CVE-2020-18668: Cross Site Scripting (XSS) vulnerabililty in WebPort <=1.19.1 via the description parameter to script/listcall

Q: How do I fix CVE-2020-18668?

web port: upgrade to newer than 1.19.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-18668 being exploited?

CVE-2020-18668 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-2020-18668 affect?

CVE-2020-18668 affects web port. Severity is medium (CVSS 5.4). Cross Site Scripting (XSS) vulnerabililty in WebPort <=1.19.1 via the description parameter to script/listcalls.

Q: How urgent is CVE-2020-18668?

Priority 38/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2020-18668 is a medium-severity flaw (CVSS 5.4) affecting web port. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerabililty in WebPort <=1.19.1 via the description parameter to script/listcalls.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-06-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: webport

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

Am I affected?

Timeline

2021-06-24 18:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

webport web port UPGRADE

Affected: <= 1.19.1

Fixed in: newer than 1.19.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy web-port || rpm -q web-port || web-port --version

2. UPGRADE to newer than 1.19.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade web-port

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade web-port

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-2020-18668?

web port: upgrade to newer than 1.19.1. Exact commands for each OS are on this page.

Is CVE-2020-18668 being exploited?

CVE-2020-18668 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-2020-18668 affect?

CVE-2020-18668 affects web port. Severity is medium (CVSS 5.4). Cross Site Scripting (XSS) vulnerabililty in WebPort <=1.19.1 via the description parameter to script/listcalls.

How urgent is CVE-2020-18668?

Priority 38/100. Public exploit reference

Related CVEs

CVE-2020-23659 MEDIUM 5.4 DOWNGRADE WebPort-v1.19.17121 is affected by Cross Site Scripting (XSS) on the "connections" feature.
CVE-2020-18665 MEDIUM 5.3 UPGRADE Directory Traversal vulnerability in WebPort <=1.19.1 in tags of system settings.
CVE-2020-18664 MEDIUM 5.4 UPGRADE Cross Site Scripting (XSS) vulnerability in WebPort <=1.19.1via the connection name parameter in type-conn.
CVE-2019-12461 MEDIUM 6.1 DOWNGRADE Web Port 1.19.1 allows XSS via the /log type parameter.
CVE-2019-12460 MEDIUM 6.1 DOWNGRADE Web Port 1.19.1 allows XSS via the /access/setup type parameter.

References

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