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CVE-2006-4308: Multiple cross-site scripting (XSS) vulnerabilities in Blackboard Learning System 6, Blackboard Learning and C

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This month
MEDIUM 4.3DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2006-4308 is a medium-severity flaw (CVSS 4.3) affecting blackboard, blackboard learning and community portal suite, vista. 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 Blackboard Learning System 6, Blackboard Learning and Community Portal Suite 6.2.3.23, and Blackboard Vista 4 allow remote attackers to inject arbitrary Javascript, VBScript, or HTML via (1) data, (2) vbscript, and (3) malformed javascript URIs in various HTML tags when posting to the Discussion Board.

Why this priority

  • Public exploit reference

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

Risk facts

CVSS score4.3 (Medium)
EPSS exploit chance2.0% (top 19%)
CISA exploited listNo
WeaknessCWE-79
Published2006-08-23
Last modified2026-06-16
Publisher (CNA): MITRE · Vendor: blackboard

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

blackboard blackboard DOWNGRADE
Affected: 6.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
1. Check installed version
apt-cache policy blackboard || rpm -q blackboard || blackboard --version
2. No fixed release: DOWNGRADE to a release before 6.0 (Debian / Ubuntu)
apt-cache madison blackboard sudo apt install blackboard=<VERSION_BEFORE_6.0> sudo apt-mark hold blackboard
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list blackboard sudo dnf downgrade blackboard-<VERSION_BEFORE_6.0> sudo dnf versionlock add blackboard
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.
blackboard blackboard learning and community portal suite DOWNGRADE
Affected: 6.0 · 6.2.3.23
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.0
1. Check installed version
apt-cache policy blackboard-learning-and-community-portal-suite || rpm -q blackboard-learning-and-community-portal-suite || blackboard-learning-and-community-portal-suite --version
2. No fixed release: DOWNGRADE to a release before 6.0 (Debian / Ubuntu)
apt-cache madison blackboard-learning-and-community-portal-suite sudo apt install blackboard-learning-and-community-portal-suite=<VERSION_BEFORE_6.0> sudo apt-mark hold blackboard-learning-and-community-portal-suite
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list blackboard-learning-and-community-portal-suite sudo dnf downgrade blackboard-learning-and-community-portal-suite-<VERSION_BEFORE_6.0> sudo dnf versionlock add blackboard-learning-and-community-portal-suite
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.
blackboard vista DOWNGRADE
Affected: 4
Fixed in: no fixed release known
Safe to downgrade to: a release before 4
1. Check installed version
apt-cache policy vista || rpm -q vista || vista --version
2. No fixed release: DOWNGRADE to a release before 4 (Debian / Ubuntu)
apt-cache madison vista sudo apt install vista=<VERSION_BEFORE_4> sudo apt-mark hold vista
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list vista sudo dnf downgrade vista-<VERSION_BEFORE_4> sudo dnf versionlock add vista
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.

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-2006-4308?

blackboard: downgrade or apply the listed mitigation; blackboard learning and community portal suite: downgrade or apply the listed mitigation; vista: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-4308 being exploited?

CVE-2006-4308 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-2006-4308 affect?

CVE-2006-4308 affects blackboard, blackboard learning and community portal suite, vista. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in Blackboard Learning System 6, Blackboard Learning and Community Portal Suite 6.2.3.23, and Blackboard Vista 4 allow remote attackers to inject arbitrary Javascript, VBScript, or HTML vi

How urgent is CVE-2006-4308?

Priority 40/100. Public exploit reference

Related CVEs

References

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