CVE-2006-6522: Multiple cross-site scripting (XSS) vulnerabilities in WikiTimeScale TwoZero before 2.31 allow remote attacker

This month

MEDIUM 6.8DOWNGRADE

CVE-2006-6522 is a medium-severity flaw (CVSS 6.8) affecting twozero. 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 WikiTimeScale TwoZero before 2.31 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors in the (1) forum module and (2) event descriptions. NOTE: some of these details are obtained 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	6.8 (Medium)
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Published	2006-12-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: wikitimescale

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

Am I affected?

Timeline

2006-12-14 01:28 UTCPublished CVE record published
2026-06-16 22:33 UTCUpdated Record last modified

wikitimescale twozero DOWNGRADE

Affected: 2.04 · 2.05 · 2.22 · 2.23 · 2.24 · 2.30

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.04

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.04 (Debian / Ubuntu)

apt-cache madison twozero sudo apt install twozero=<VERSION_BEFORE_2.04> sudo apt-mark hold twozero

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

dnf --showduplicates list twozero sudo dnf downgrade twozero-<VERSION_BEFORE_2.04> sudo dnf versionlock add twozero

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-2006-6522?

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

Is CVE-2006-6522 being exploited?

CVE-2006-6522 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-2006-6522 affect?

CVE-2006-6522 affects twozero. Severity is medium (CVSS 6.8). Multiple cross-site scripting (XSS) vulnerabilities in WikiTimeScale TwoZero before 2.31 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors in the (1) forum module and (2) event descriptions. NOTE: some o

How urgent is CVE-2006-6522?

Priority 41/100. No elevated risk signals yet.

References

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