Answer in brief
CVE-2026-16536 records a Medium severity (CVSS 5.3) vulnerability in Simple Google Calendar Outlook Events Widget < 3.1.0 - Unauthenticated SSRF via calendar_id. The current sources do not mark it as known exploited. The current feed maps Unknown/Simple Google Calendar Outlook Events Widget (generic). 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 5.3. 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 Unknown/Simple Google Calendar Outlook Events Widget (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Simple Google Calendar Outlook Events Widgetgeneric | >=0 <3.1.0 | 3.1.0 |
Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
The Simple Google Calendar Outlook Events Widget WordPress plugin before 3.1.0 does not validate a user-supplied URL before performing a server-side request, allowing unauthenticated attackers to perform Server-Side Request Forgery attacks and, in some cases, read the response of the internal request.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-16536 records a Medium severity (CVSS 5.3) vulnerability in Simple Google Calendar Outlook Events Widget < 3.1.0 - Unauthenticated SSRF via calendar_id. The current sources do not mark it as known exploited. The current feed maps Unknown/Simple Google Calendar Outlook Events Widget (generic). 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 5.3. 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 Unknown/Simple Google Calendar Outlook Events Widget (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Unknown/Simple Google Calendar Outlook Events Widgetgeneric | >=0 <3.1.0 | 3.1.0 |
Published upstream
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
The Simple Google Calendar Outlook Events Widget WordPress plugin before 3.1.0 does not validate a user-supplied URL before performing a server-side request, allowing unauthenticated attackers to perform Server-Side Request Forgery attacks and, in some cases, read the response of the internal request.
Quoted source text, attributed separately from HOL analysis.