Answer in brief
CVE-2020-5241 records a High severity (CVSS 7.7) vulnerability in XSS/Script injection vulnerability in matestack. The current sources do not mark it as known exploited. The current feed maps matestack-ui-core (rubygems). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps matestack-ui-core (rubygems). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| matestack-ui-corerubygems | >=0 <0.7.4 | 0.7.4 |
Published upstream
Feb 12, 2020
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
matestack-ui-core (RubyGem) before 0.7.4 is vulnerable to XSS/Script injection. This vulnerability is patched in version 0.7.4.
Quoted source text, attributed separately from HOL analysis.