XSS in Simplemachines Simple Machines Forum
CVE-2025-67163
A stored cross-site scripting (XSS) vulnerability in Simple Machines Forum v2.1.6 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Forum Name parameter.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (15.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Simplemachines Simple Machines Forum — versions 2.1.6
Weakness classification (CWE)
References
- github.com/SimpleMachines/SMF/security/advisories/GHSA-p2xm-x9fp-5r7x (Broken Link)
- github.com/SimpleMachines/SMF/blob/release-3.0/Themes/default/Stats.template.php (Product)
- github.com/SimpleMachines/SMF (Product)
- wiki.simplemachines.org/smf/Installing (Product)
- github.com/mbiesiad/vulnerability-research/tree/main/CVE-2025-67163 (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-67163?
- CVE-2025-67163 is a medium-severity vulnerability in Simplemachines Simple Machines Forum, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2025-12-18.
- How severe is CVE-2025-67163?
- Medium severity. CVSS v3 base score is 6.1 out of 10.