How severe is CVE-2018-18965?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Is CVE-2018-18965 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Oscommerce Online Merchant

CVE-2018-18965

osCommerce 2.3.4.1 has an incomplete '.htaccess' for blacklist filtering in the "product" page. The .htaccess file in catalog/images/ bans the html extension, but there are several alternative cases in which HTML can be executed, such as a file with no extension or an unrecognized extension (e.g., the test or test.asdf filename).

EPSS: 0.010 (59.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

Affected products

Oscommerce Online_merchant — versions 2.3.4.1
N/a — versions n/a

Public proof-of-concept exploits

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-18965?: CVE-2018-18965 is a medium-severity vulnerability in Oscommerce Online Merchant. CVSS score: 4.9/10. Published 2018-11-06.
How severe is CVE-2018-18965?: Medium severity. CVSS v3 base score is 4.9 out of 10.
Is CVE-2018-18965 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.