CVE-2026-118167 json
MC4WP: Mailchimp for WordPress < 4.15.0 - Unauthenticated Subscription Audience Override
published 2026-11-06 3 d ago modified 2026-11-06 2 d ago also EUVD-2026-117912
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
The MC4WP: Mailchimp for WordPress plugin before 4.15.0 does not validate that the Mailchimp audience a sign-up form or bundled integration subscribes a visitor to matches the audience configured by the site owner, allowing unauthenticated visitors to subscribe arbitrary email addresses to any other audience in the site's connected Mailchimp account.
Patch / fix
- Unknown MC4WP: Mailchimp for WordPress 4.15.0
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3 d ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/11752539-1dc8-4adb-a680-ce7ecaaff4d1/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- Unknown MC4WP: Mailchimp for WordPress
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
- Technology feeds
References
-
wpscan.com
/vulnerability/11752539-1dc8-4adb-a680-ce7ecaaff4d1/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-118167
- NVD CVE-2026-118167
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.