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CVE-2018-18965

19
FAUCET Score

CVE-2018-18965 is an incomplete blacklist filtering vulnerability in osCommerce 2.3.4.1, specifically affecting the "product" page. An authenticated attacker can bypass the .htaccess file's HTML extension ban by uploading files with no extension or unrecognized extensions, leading to potential arbitrary HTML execution. Rated Medium severity (CVSS 4.9), the attack requires high privileges but has low attack complexity, impacting integrity without affecting confidentiality or availability. There is no evidence of active exploitation, public exploit code, or significant community discussion for this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.4.1CPE matchmatch criteria
cpe:2.3:a:oscommerce:online_merchant:2.3.4.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.9MEDIUM

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 65th percentile among its peer group of 3,566 CVEs.

Social Chatter

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

github.com / osCommerce/oscommerce2/issues/631
Third Party Advisory