Cross-Site Scripting
7 records63.6%First: 2016. Latest: 2024.
Plugin security history
MC4WP: Mailchimp for WordPress Vulnerability History & Security Timeline
The Wordfence Intelligence dataset currently contains 11 vulnerability records associated with MC4WP: Mailchimp for WordPress, published between 2016 and 2026.
Dataset last synchronized: 2026-08-03 00:31:25 UTC
At a glance
Security Snapshot
11Total records
0Critical
1High
10Medium
0Low
0Informational
11Patched records
0Currently marked unpatched
2016-12-13First disclosure
2026-03-10Latest disclosure
7 of 11CVE coverage
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Year-by-Year Timeline
| Year | Records | Relative volume |
|---|---|---|
| 2016 | 1 | |
| 2017 | 1 | |
| 2019 | 1 | |
| 2021 | 2 | |
| 2022 | 2 | |
| 2023 | 1 | |
| 2024 | 2 | |
| 2026 | 1 |
Severity Breakdown
| Severity | Records | Share |
|---|---|---|
| High | 1 | 9.1% |
| Medium | 10 | 90.9% |
Vulnerability-Type Breakdown
Missing Authorization
2 records18.2%First: 2023. Latest: 2026.
CSRF
1 record9.1%First: 2021. Latest: 2021.
Other
1 record9.1%First: 2021. Latest: 2021.
Patch Status
- Patched
- 11
- Currently marked unpatched
- 0
- Unknown status
- 0
Patch status reflects the latest successfully synchronized source dataset and must be checked against the installed version.
Latest Known Patched Versions
4.12.04.9.174.9.104.8.74.8.54.1.74.1.84.0.11
Affected-Version History
Ranges are deduplicated by source range record and shown with the associated disclosure and known patched versions.
| Affected range | Vulnerability | Published | Patched version | Severity |
|---|---|---|---|---|
*-4.11.1 | MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion | March 10, 2026 | 4.12.0 | Medium |
*-4.9.16 | MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting | September 20, 2024 | 4.9.17 | Medium |
4.9.9-4.9.16 | MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting | September 18, 2024 | 4.9.17 | Medium |
*-4.9.9 | MC4WP <= 4.9.9 - Missing Authorization via listen | December 27, 2023 | 4.9.10 | Medium |
*-4.8.6 | MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting | March 2, 2022 | 4.8.7 | Medium |
[*, 4.8.7) | MC4WP: Mailchimp for WordPress < 4.8.7 - Cross-Site Scripting | March 2, 2022 | 4.8.7 | Medium |
*-4.8.4 | MC4WP: Mailchimp for WordPress <= 4.8.4 - Open Redirect | June 1, 2021 | 4.8.5 | Medium |
*-4.8.4 | MC4WP: Mailchimp for WordPress <= 4.8.4 - Cross-Site Request Forgery | June 1, 2021 | 4.8.5 | High |
*-4.1.6 | MC4WP: Mailchimp for WordPress <= 4.1.6 - Reflected Cross-Site Scripting | November 9, 2019 | 4.1.7 | Medium |
*-4.1.7 | Mailchimp For WP <= 4.1.7 - Cross-Site Scripting | September 8, 2017 | 4.1.8 | Medium |
[*, 4.0.11) | MailChimp for WordPress <= 4.0.10 - Reflected Cross-Site Scripting | December 13, 2016 | 4.0.11 | Medium |
Selected source records
Latest Records
MediumCVE-2026-1781
MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion
Published: March 10, 2026
- Affected versions
- *-4.11.1
- Patched versions
- 4.12.0
MediumCVE-2024-8680
MailChimp for Wordpress <= 4.9.16 - Authenticated (Administrator+) Stored Cross-Site Scripting
Published: September 20, 2024
- Affected versions
- *-4.9.16
- Patched versions
- 4.9.17
MediumCVE-2024-8850
MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting
Published: September 18, 2024
- Affected versions
- 4.9.9-4.9.16
- Patched versions
- 4.9.17
MediumCVE-2023-51682
MC4WP <= 4.9.9 - Missing Authorization via listen
Published: December 27, 2023
- Affected versions
- *-4.9.9
- Patched versions
- 4.9.10
MediumCVE-2021-36833
MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting
Published: March 2, 2022
- Affected versions
- *-4.8.6
- Patched versions
- 4.8.7
Medium
MC4WP: Mailchimp for WordPress < 4.8.7 - Cross-Site Scripting
Published: March 2, 2022
- Affected versions
- [*, 4.8.7)
- Patched versions
- 4.8.7
High
MC4WP: Mailchimp for WordPress <= 4.8.4 - Cross-Site Request Forgery
Published: June 1, 2021
- Affected versions
- *-4.8.4
- Patched versions
- 4.8.5
Medium
MC4WP: Mailchimp for WordPress <= 4.8.4 - Open Redirect
Published: June 1, 2021
- Affected versions
- *-4.8.4
- Patched versions
- 4.8.5
Highest-Severity Records
High
MC4WP: Mailchimp for WordPress <= 4.8.4 - Cross-Site Request Forgery
Published: June 1, 2021
- Affected versions
- *-4.8.4
- Patched versions
- 4.8.5
MediumCVE-2026-1781
MC4WP: Mailchimp for WordPress <= 4.11.1 - Missing Authorization to Unauthenticated Arbitrary Subscription Deletion
Published: March 10, 2026
- Affected versions
- *-4.11.1
- Patched versions
- 4.12.0
MediumCVE-2016-10871
MailChimp for WordPress <= 4.0.10 - Reflected Cross-Site Scripting
Published: December 13, 2016
- Affected versions
- [*, 4.0.11)
- Patched versions
- 4.0.11
MediumCVE-2024-8850
MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting
Published: September 18, 2024
- Affected versions
- 4.9.9-4.9.16
- Patched versions
- 4.9.17
MediumCVE-2017-18577
Mailchimp For WP <= 4.1.7 - Cross-Site Scripting
Published: September 8, 2017
- Affected versions
- *-4.1.7
- Patched versions
- 4.1.8
Medium
MC4WP: Mailchimp for WordPress <= 4.1.6 - Reflected Cross-Site Scripting
Published: November 9, 2019
- Affected versions
- *-4.1.6
- Patched versions
- 4.1.7
Medium
MC4WP: Mailchimp for WordPress <= 4.8.4 - Open Redirect
Published: June 1, 2021
- Affected versions
- *-4.8.4
- Patched versions
- 4.8.5
MediumCVE-2021-36833
MC4WP: Mailchimp for WordPress <= 4.8.6 - Authenticated (Admin+) Stored Cross-Site Scripting
Published: March 2, 2022
- Affected versions
- *-4.8.6
- Patched versions
- 4.8.7
Need help reviewing an exposed WordPress website?
Running an affected version does not prove that a website was compromised. Suspicious redirects, unknown administrators, injected content, unexpected files or recurring malware may require a manual investigation.
Vulnerability data: Wordfence Intelligence. Analysis and practical guidance: 3Zero Digital.
Data Source, Attribution and Methodology
This page aggregates active Production Feed records. Counts are not software-quality rankings, and an affected version does not prove exploitation or infection. Read the full methodology.