Simple Calendar <= 3.1.42 — Cross-Site Request Forgery to Transient Cache Clearing
248b74d3-5228-473d-a79a-743566898606Published · Updated Action summary
Affected: ≤3.1.42Update to 3.1.43 or newer
All remediation steps- Severity
- Medium4.3
- CVSS
- 4.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-352 CSRF
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Simple Calendar – Google Calendar, Events, & ICS Feeds google-calendar-events
- Affected≤ 3.1.42
- Patched in3.1.43
Update to 3.1.43 or newer.
You are affected if you run ≤ 3.1.42. Version 3.1.43 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Simple Calendar – Google Calendar, Events, & ICS Feeds.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.1.43, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Simple Calendar – Google Calendar, Events, & ICS Feeds to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence.
The Simple Calendar plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.1.42. This is due to missing nonce validation on the clear_cache() function used to clear the plugin's transients. This makes it possible for unauthenticated attackers to clear the plugin's transients for a given id, via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Simple Calendar – Google Calendar, Events, & ICS Feeds
All 7| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Unauthenticated Insecure Direct Object Reference ≤3.5.9Update to 3.6.0 | CVE-2025-68979 | |
| Medium6.1 | Reflected Cross-Site Scripting ≤3.4.2Update to 3.4.3 | CVE-2024-8549 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via shortcode ≤3.2.7Update to 3.2.8 | CVE-2023-49151 | |
| Medium4.3 | Cross-Site Request Forgery via duplicate_feed <3.2.5Update to 3.2.5 | — | |
| Medium4.3 | Cross-Site Request Forgery via bulk_actions ≤3.2.5Update to 3.2.6 | CVE-2023-46189 |
- Medium5.3Unauthenticated Insecure Direct Object Reference
≤3.5.9Update to 3.6.0
- Medium6.1Reflected Cross-Site Scripting
≤3.4.2Update to 3.4.3
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via shortcode
≤3.2.7Update to 3.2.8
- Medium4.3Cross-Site Request Forgery via duplicate_feed
<3.2.5Update to 3.2.5
- Medium4.3Cross-Site Request Forgery via bulk_actions
≤3.2.5Update to 3.2.6
Same weakness (CSRF)
All CSRF| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 4.3
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.