CVE-2006-6687: Cross-site scripting (XSS) vulnerability in Web Automated Perl Portal (WebAPP) 0.9.9.4, and 0.9.9.3.4 Network

Routine

MEDIUM 4.3DOWNGRADE

CVE-2006-6687 is a medium-severity flaw (CVSS 4.3) affecting webapp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in Web Automated Perl Portal (WebAPP) 0.9.9.4, and 0.9.9.3.4 Network Edition (NE) (aka WebAPP.NET), allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. NOTE: The provenance of this information is unknown; the details are obtained solely from third party information.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-79
Published	2006-12-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: web-app.net

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-12-21 21:28 UTCPublished CVE record published
2026-06-16 22:33 UTCUpdated Record last modified

web-app.net webapp DOWNGRADE

Affected: 0.9.9.3.4 · 0.9.9.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.9.3.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.9.3.4 (Debian / Ubuntu)

apt-cache madison webapp sudo apt install webapp=<VERSION_BEFORE_0.9.9.3.4> sudo apt-mark hold webapp

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

dnf --showduplicates list webapp sudo dnf downgrade webapp-<VERSION_BEFORE_0.9.9.3.4> sudo dnf versionlock add webapp

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-2006-6687?

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

Is CVE-2006-6687 being exploited?

CVE-2006-6687 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-2006-6687 affect?

CVE-2006-6687 affects webapp. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in Web Automated Perl Portal (WebAPP) 0.9.9.4, and 0.9.9.3.4 Network Edition (NE) (aka WebAPP.NET), allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. NOTE: The

How urgent is CVE-2006-6687?

Priority 30/100. No elevated risk signals yet.

Software pages

Perl vulnerabilities

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References

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