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CVE-2006-6840

25
FAUCET Score

CVE-2006-6840 is an unspecified vulnerability affecting phpBB versions prior to 2.0.22, stemming from a "negative start parameter." This flaw carries a critical CVSS score of 10.0, indicating a severe risk with remote attack vectors, low attack complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this decade-old vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.2.4_rc3CPE matchmatch criteria
cpe:2.3:a:phpbb_group:phpbb:1.2.4_rc3:*:*:*:*:*:*:*
2.0.18CPE matchmatch criteria
cpe:2.3:a:phpbb_group:phpbb:2.0.18:*:*:*:*:*:*:*
2.0.20CPE matchmatch criteria
cpe:2.3:a:phpbb_group:phpbb:2.0.20:*:*:*:*:*:*:*
2.0.21CPE matchmatch criteria
cpe:2.3:a:phpbb_group:phpbb:2.0.21:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.57%
Probability of exploitation in next 30 days
EPSS Percentile
72.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0157 is in the 55th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugs.debian.org / cgi-bin/bugreport.cgi
secunia.com / advisories/28871
debian.org / security/2008/dsa-1488
phpbb.com / phpBB/viewtopic.php
Patch
securityfocus.com / bid/21806
Patch