CVE-2006-1811: Multiple SQL injection vulnerabilities in FlexBB 0.5.5 BETA allow remote attackers to execute arbitrary SQL co

Routine

MEDIUM 6.4DOWNGRADE

CVE-2006-1811 is a medium-severity flaw (CVSS 6.4) affecting flexbb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple SQL injection vulnerabilities in FlexBB 0.5.5 BETA allow remote attackers to execute arbitrary SQL commands via the (1) id, (2) forumid, or (3) threadid parameter to index.php; the (4) ICQ, (5) AIM, (6) MSN, (7) Google Talk, (8) Website Name, (9) Website Address, (10) Email Address, (11) Location, (12) Signature, and (13) Sub-Titles fields in the user profile; or (14) flexbb_password field in a cookie.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	1.1% (top 36%)
CISA exploited list	No
Published	2006-04-18
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: flexbb

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

Am I affected?

Timeline

2006-04-18 10:02 UTCPublished CVE record published
2026-06-16 22:23 UTCUpdated Record last modified

flexbb flexbb DOWNGRADE

Affected: 0.5.5_beta

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.5.5_beta

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.5.5_beta (Debian / Ubuntu)

apt-cache madison flexbb sudo apt install flexbb=<VERSION_BEFORE_0.5.5_beta> sudo apt-mark hold flexbb

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

dnf --showduplicates list flexbb sudo dnf downgrade flexbb-<VERSION_BEFORE_0.5.5_beta> sudo dnf versionlock add flexbb

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-2006-1811?

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

Is CVE-2006-1811 being exploited?

CVE-2006-1811 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-2006-1811 affect?

CVE-2006-1811 affects flexbb. Severity is medium (CVSS 6.4). Multiple SQL injection vulnerabilities in FlexBB 0.5.5 BETA allow remote attackers to execute arbitrary SQL commands via the (1) id, (2) forumid, or (3) threadid parameter to index.php; the (4) ICQ, (5) AIM, (6) MSN, (7) Google Talk, (8) We

How urgent is CVE-2006-1811?

Priority 39/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2008-0157 HIGH 7.5 UPGRADE SQL injection vulnerability in FlexBB 0.6.3 and earlier allows remote attackers to execute arbitrary SQL comma
CVE-2007-1729 HIGH 7.5 DOWNGRADE SQL injection vulnerability in includes/start.php in Flexbb 1.0.0 10005 Beta Release 1 allows remote attackers
CVE-2006-2034 HIGH 7.5 DOWNGRADE SQL injection vulnerability in function/showprofile.php in FlexBB 0.5.5 allows remote attackers to execute arb
CVE-2006-1978 HIGH 7.5 UPGRADE SQL injection vulnerability in inc/start.php in FlexBB 0.5.5 and earlier allows remote attackers to execute ar
CVE-2006-1977 MEDIUM 5.8 UPGRADE Cross-site scripting (XSS) vulnerability in FlexBB 0.5.7 BETA and earlier allows remote attackers to inject ar

References

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