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CVE-2006-5503

21
FAUCET Score

CVE-2006-5503 describes a cross-site scripting (XSS) vulnerability in the index.php file of Simple Machines Forum (SMF) version 1.1 RC2. This flaw allows remote attackers to inject arbitrary web script or HTML into affected SMF installations by manipulating the 'action' parameter. The vulnerability has a CVSS score of 4.3, indicating a medium severity, and could lead to information disclosure or session hijacking due to its low impact on integrity and availability. While not listed on the KEV catalog, exploit code is publicly available via ExploitDB, though there is no evidence of active exploitation, Metasploit modules, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.1_rc2CPE matchmatch criteria
cpe:2.3:a:simple_machines:simple_machines_forum:1.1_rc2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.64%
Probability of exploitation in next 30 days
EPSS Percentile
73.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-28831 · Oct 19, 2006
This CVE's current EPSS score of 0.0164 is in the 50th percentile among its peer group of 19,958 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

securityreason.com / securityalert/1772
exchange.xforce.ibmcloud.com / vulnerabilities/29690
securityfocus.com / archive/1/449241/100/0/threaded
securityfocus.com / bid/20629
Exploit