CVE-2008-6618: Multiple SQL injection vulnerabilities in ClassSystem 2.3 allow remote attackers to execute arbitrary SQL comm

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HIGH 7.5DOWNGRADE

CVE-2008-6618 is a high-severity flaw (CVSS 7.5) affecting classsystem. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple SQL injection vulnerabilities in ClassSystem 2.3 allow remote attackers to execute arbitrary SQL commands via the teacher_id parameter in (1) class/HomepageMain.php and (2) class/HomepageTop.php, and (3) the message_id parameter in class/MessageReply.php.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-89
Published	2009-04-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: netlab

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

Am I affected?

Timeline

2009-04-06 18:30 UTCPublished CVE record published
2026-06-16 23:02 UTCUpdated Record last modified

netlab classsystem DOWNGRADE

Affected: 2.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.3 (Debian / Ubuntu)

apt-cache madison classsystem sudo apt install classsystem=<VERSION_BEFORE_2.3> sudo apt-mark hold classsystem

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

dnf --showduplicates list classsystem sudo dnf downgrade classsystem-<VERSION_BEFORE_2.3> sudo dnf versionlock add classsystem

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: ClassSystem 2.0/2.3 - 'HomepageMain.php?teacher_id' SQL Injection
Exploit-DB: ClassSystem 2.0/2.3 - 'HomepageTop.php?teacher_id' SQL Injection
Exploit-DB: ClassSystem 2.0/2.3 - 'MessageReply.php?teacher_id' SQL Injection

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-2008-6618?

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

Is CVE-2008-6618 being exploited?

CVE-2008-6618 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-2008-6618 affect?

CVE-2008-6618 affects classsystem. Severity is high (CVSS 7.5). Multiple SQL injection vulnerabilities in ClassSystem 2.3 allow remote attackers to execute arbitrary SQL commands via the teacher_id parameter in (1) class/HomepageMain.php and (2) class/HomepageTop.php, and (3) the message_id parameter in

How urgent is CVE-2008-6618?

Priority 51/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2008-6619 MEDIUM 6.8 DOWNGRADE Unrestricted file upload vulnerability in class/ApplyDB.php in ClassSystem 2.3 allows remote attackers to exec

References

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