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CVE-2017-1000507

CVE-2017-1000507: Canvs Canvas XSS Vulnerability

5.4

CVSS Score
3.0

Basic Information

CVE ID
CVE-2017-1000507
GHSA ID
GHSA-94hc-7qc9-34rf
EPSS Score
0.54472%
CWE
CWE-79
Published
5/14/2022
Updated
10/31/2023
KEV Status
No
Technology
TechnologyPHP

Technical Details

CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Package NameEcosystemVulnerable VersionsFirst Patched Version
austintoddj/canvascomposer<= 3.4.2

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability manifests when a malicious display name is rendered unescaped in the admin interface. The GitHub issue explicitly states remediation requires HTML encoding during output, indicating the XSS occurs at rendering time rather than storage. In Laravel Blade templates, unescaped output syntax ({!! !!}) would be the primary suspect. While the exact function name isn't available without code, the view template rendering user data is the clear vulnerable component.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

**nvs **nv*s v*rsion *.*.* *ont*ins * *ross Sit* S*riptin* (XSS) vuln*r**ility in Us*r's **t*ils t**t **n r*sult in **ni*l o* s*rvi** *n* *x**ution o* j*v*s*ript *o**.

Reasoning

T** vuln*r**ility m*ni**sts w**n * m*li*ious *ispl*y n*m* is r*n**r** un*s**p** in t** **min int*r****. T** *it*u* issu* *xpli*itly st*t*s r*m**i*tion r*quir*s *TML *n*o*in* *urin* output, in*i**tin* t** XSS o**urs *t r*n**rin* tim* r*t**r t**n stor*