CVE-2006-4206: Cross-site scripting (XSS) vulnerability in calendar.asp in ASPPlayground.NET Forum Advanced Edition 2.4.5 Uni

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MEDIUM 4.3DOWNGRADE

CVE-2006-4206 is a medium-severity flaw (CVSS 4.3) affecting aspplayground.net. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in calendar.asp in ASPPlayground.NET Forum Advanced Edition 2.4.5 Unicode, and possibly other versions before October 15, 2006, allows remote attackers to inject arbitrary web script or HTML via the calendarID parameter.

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	2.6% (top 15%)
CISA exploited list	No
Published	2006-08-17
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: aspplayground.net

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

Am I affected?

Timeline

2006-08-17 21:04 UTCPublished CVE record published
2026-06-16 22:28 UTCUpdated Record last modified

aspplayground.net aspplayground.net DOWNGRADE

Affected: 2.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.5

1. Check installed version

apt-cache policy aspplayground.net || rpm -q aspplayground.net || aspplayground.net --version

2. No fixed release: DOWNGRADE to a release before 2.4.5 (Debian / Ubuntu)

apt-cache madison aspplayground.net sudo apt install aspplayground.net=<VERSION_BEFORE_2.4.5> sudo apt-mark hold aspplayground.net

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

dnf --showduplicates list aspplayground.net sudo dnf downgrade aspplayground.net-<VERSION_BEFORE_2.4.5> sudo dnf versionlock add aspplayground.net

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: ASPPlayGround.NET Forum 2.4.5 - 'Calendar.asp' 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-2006-4206?

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

Is CVE-2006-4206 being exploited?

CVE-2006-4206 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-2006-4206 affect?

CVE-2006-4206 affects aspplayground.net. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in calendar.asp in ASPPlayground.NET Forum Advanced Edition 2.4.5 Unicode, and possibly other versions before October 15, 2006, allows remote attackers to inject arbitrary web script or HTML via the

How urgent is CVE-2006-4206?

Priority 41/100. Public exploit reference

References

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