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CVE-2020-13870

CVE-2020-13870: Comments plugin stored Cross-site Scripting (XSS) via an asset volume name

5.4

CVSS Score
3.1

Basic Information

CVE ID
CVE-2020-13870
GHSA ID
GHSA-69ww-wv3j-mhg4
EPSS Score
0.43188%
CWE
CWE-79
Published
5/24/2022
Updated
4/24/2024
KEV Status
No
Technology
TechnologyPHP

Technical Details

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Package NameEcosystemVulnerable VersionsFirst Patched Version
verbb/commentscomposer< 1.5.51.5.5

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability explicitly involves XSS through asset volume names. The patch notes (v1.5.5) specifically mention fixing XSS in asset volume names, indicating the rendering logic lacked proper output encoding. While exact function names aren't available, the pattern suggests: 1) Data flow from volume name storage to display contexts 2) Missing HTML entity encoding in template rendering 3) Trusted treatment of volume names as safe HTML. The high confidence comes from the direct correlation between the vulnerability description and common XSS patterns in template rendering systems.

Vulnerable functions

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

WAF Protection Rules

WAF Rule

*n issu* w*s *is*ov*r** in t** *omm*nts plu*in ***or* *.*.* *or *r**t *MS. T**r* is stor** XSS vi* *n *ss*t volum* n*m*.

Reasoning

T** vuln*r**ility *xpli*itly involv*s XSS t*rou** *ss*t volum* n*m*s. T** p*t** not*s (v*.*.*) sp**i*i**lly m*ntion *ixin* XSS in *ss*t volum* n*m*s, in*i**tin* t** r*n**rin* lo*i* l**k** prop*r output *n*o*in*. W*il* *x**t *un*tion n*m*s *r*n't *v*i