CVE-2018-6193: A Cross-Site Scripting (XSS) vulnerability was found in Routers2 2.24, affecting the 'rtr' GET parameter in a

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MEDIUM 4.7DOWNGRADE

CVE-2018-6193 is a medium-severity flaw (CVSS 4.7) affecting routers2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A Cross-Site Scripting (XSS) vulnerability was found in Routers2 2.24, affecting the 'rtr' GET parameter in a page=graph action to cgi-bin/routers2.pl.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-01-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: routers2 project

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

Am I affected?

Timeline

2018-01-24 21:29 UTCPublished CVE record published
2026-06-17 02:01 UTCUpdated Record last modified

routers2 project routers2 DOWNGRADE

Affected: 2.24

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.24

1. Check installed version

apt-cache policy routers2 || rpm -q routers2 || routers2 --version

2. No fixed release: DOWNGRADE to a release before 2.24 (Debian / Ubuntu)

apt-cache madison routers2 sudo apt install routers2=<VERSION_BEFORE_2.24> sudo apt-mark hold routers2

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

dnf --showduplicates list routers2 sudo dnf downgrade routers2-<VERSION_BEFORE_2.24> sudo dnf versionlock add routers2

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.

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: Routers2 2.24 - 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-2018-6193?

routers2: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-6193 being exploited?

CVE-2018-6193 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-2018-6193 affect?

CVE-2018-6193 affects routers2. Severity is medium (CVSS 4.7). A Cross-Site Scripting (XSS) vulnerability was found in Routers2 2.24, affecting the 'rtr' GET parameter in a page=graph action to cgi-bin/routers2.pl.

How urgent is CVE-2018-6193?

Priority 42/100. Public exploit reference

References

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