CVE-2006-1427: Multiple cross-site scripting (XSS) vulnerabilities in WebAPP 0.9.9.3.2 and earlier allow remote attackers to

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MEDIUM 4.3DOWNGRADE

CVE-2006-1427 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.

Multiple cross-site scripting (XSS) vulnerabilities in WebAPP 0.9.9.3.2 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) action, (2) id, (3) num, (4) board, (5) cat, (6) real, (7) viewcat, (8) img, or (9) curcatname parameter in cgi-bin/index.cgi, or (10) vsSD parameter in /mods/calendar/index.cgi.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.5% (top 16%)
CISA exploited list	No
Published	2006-03-28
Last modified	2026-06-16

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

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

Am I affected?

Timeline

2006-03-28 20:02 UTCPublished CVE record published
2026-06-16 22:22 UTCUpdated Record last modified

web-app.org webapp DOWNGRADE

Affected: 0.9.9.1 · 0.9.9.2 · 0.9.9.2.1 · 0.9.9.3 · 0.9.9.3.1 · 0.9.9.3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9.9.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9.9.1 (Debian / Ubuntu)

apt-cache madison webapp sudo apt install webapp=<VERSION_BEFORE_0.9.9.1> sudo apt-mark hold webapp

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

dnf --showduplicates list webapp sudo dnf downgrade webapp-<VERSION_BEFORE_0.9.9.1> 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.

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: Web-APP.net WebAPP 0.9.x - '/mods/calendar/index.cgi?vsSD' Cross-Site Scripting
Exploit-DB: Web-APP.net WebAPP 0.9.x - 'index.cgi' Multiple Cross-Site Scripting Vulnerabilities

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-2006-1427?

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

Is CVE-2006-1427 being exploited?

CVE-2006-1427 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-2006-1427 affect?

CVE-2006-1427 affects webapp. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in WebAPP 0.9.9.3.2 and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) action, (2) id, (3) num, (4) board, (5) cat, (6) real, (7) viewcat, (8) img, or (9

How urgent is CVE-2006-1427?

Priority 41/100. Public exploit reference

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References

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