CVE-2008-6730: Multiple SQL injection vulnerabilities in admin/usercheck.php in FlexPHPLink Pro 0.0.6 and 0.0.7, when magic_q

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MEDIUM 6.8DOWNGRADE

CVE-2008-6730 is a medium-severity flaw (CVSS 6.8) affecting flexphplink. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple SQL injection vulnerabilities in admin/usercheck.php in FlexPHPLink Pro 0.0.6 and 0.0.7, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via (1) the checkuser parameter (aka username field), or (2) the checkpass parameter (aka password field), to admin/index.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-89
Published	2009-04-20
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: china-on-site

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

Am I affected?

Timeline

2009-04-20 14:30 UTCPublished CVE record published
2026-06-16 23:02 UTCUpdated Record last modified

china-on-site flexphplink DOWNGRADE

Affected: 0.0.6 · 0.0.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.0.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.0.6 (Debian / Ubuntu)

apt-cache madison flexphplink sudo apt install flexphplink=<VERSION_BEFORE_0.0.6> sudo apt-mark hold flexphplink

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

dnf --showduplicates list flexphplink sudo dnf downgrade flexphplink-<VERSION_BEFORE_0.0.6> sudo dnf versionlock add flexphplink

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: Flexphplink 0.0.x - Authentication Bypass

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-2008-6730?

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

Is CVE-2008-6730 being exploited?

CVE-2008-6730 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-2008-6730 affect?

CVE-2008-6730 affects flexphplink. Severity is medium (CVSS 6.8). Multiple SQL injection vulnerabilities in admin/usercheck.php in FlexPHPLink Pro 0.0.6 and 0.0.7, when magic_quotes_gpc is disabled, allow remote attackers to execute arbitrary SQL commands via (1) the checkuser parameter (aka username fiel

How urgent is CVE-2008-6730?

Priority 49/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2008-6731 HIGH 9.3 DOWNGRADE Unrestricted file upload vulnerability in submitlink.php in FlexPHPLink Pro 0.0.7 allows remote attackers to e

References

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