How severe is CVE-2008-6659?

CVE-2008-6659 has a CVSS 2.0 base score of 5.5, rated medium severity.

Is CVE-2008-6659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-6659?

CVE-2008-6659 primarily affects Simple Machines Simple Machines Forum. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-6659?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-6659 published?

CVE-2008-6659 was published on 2009-04-07 and last updated on 2026-06-16.

CVE-2008-6659

CVE-2008-6659 is a medium-severity vulnerability in Simple Machines Simple Machines Forum with a CVSS 2.0 base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 2.0 base score 5.5)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Simple Machines Simple Machines Forum
Published: 2009-04-07
Last modified: 2026-06-16

Description

Directory traversal vulnerability in index.php in Simple Machines Forum (SMF) 1.0 before 1.0.15 and 1.1 before 1.1.7 allows remote authenticated users to configure arbitrary local files for execution via directory traversal sequences in the value of the theme_dir field during a jsoption action, related to Sources/QueryString.php and Sources/Themes.php, as demonstrated by a local .gif file in attachments/ with PHP code that was uploaded through a profile2 action to index.php.

Frequently asked questions

What is CVE-2008-6659?: Directory traversal vulnerability in index.php in Simple Machines Forum (SMF) 1.0 before 1.0.15 and 1.1 before 1.1.7 allows remote authenticated users to configure arbitrary local files for execution via directory traversal sequences in the value of the theme_dir field during a jsoption action, related to Sources/QueryString.php and Sources/Themes.php, as demonstrated by a local .gif file in attachments/ with PHP code that was uploaded through a profile2 action to index.php.
How severe is CVE-2008-6659?: CVE-2008-6659 has a CVSS 2.0 base score of 5.5, rated medium severity.
Is CVE-2008-6659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-6659?: CVE-2008-6659 primarily affects Simple Machines Simple Machines Forum. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-6659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-6659 published?: CVE-2008-6659 was published on 2009-04-07 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:a:simple_machines:simple_machines_forum:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.0.11:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.0.12:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1_rc1:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1_rc2:*:*:*:*:*:*:*
cpe:2.3:a:simple_machines:simple_machines_forum:1.1_rc3:*:*:*:*:*:*:*

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