CVE-2023-6187
HighPaid Memberships Pro <= 2.12.3 - Authenticated (Subscriber+) Arbitrary File Upload
Published Nov 20, 2023 · Updated Aug 12, 2026 · Also known as 5979f2eb-2ca8-4b06-814c-c4236bb81af0, TR-23-0647
Key Facts
Patch immediately- CVE-2023-6187 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Paid Memberships Pro (Strangerstudios), Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 51% probability of exploitation in the next 30 days.
- Fixed versions are available, including Paid Memberships Pro 2.12.4, Paid Memberships Pro 2.12.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
51%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2023-6187 brief as a PDF
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Description
The Paid Memberships Pro plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'pmpro_paypalexpress_session_vars_for_user_fields' function in versions up to, and including, 2.12.3. This makes it possible for authenticated attackers with subscriber privileges or above, to upload arbitrary files on the affected site's server which may make remote code execution possible. This can be exploited if 2Checkout (deprecated since version 2.6) or PayPal Express is set as the payment method and a custom user field is added that is only visible at profile, and not visible at checkout according to its settings.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Paid Memberships ProStrangerstudios | See advisory | 2.12.3 |
| Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions | See advisory | n/a |
Patched Releases
Paid Memberships Pro
2.12.4, 2.12.3
Timeline
Publicly disclosed
Nov 20, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6187.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-6187
- advisoryhttps://www.security-database.com/detail.php?alert=CVE-2023-6187
- advisoryUSOM advisory
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/5979f2eb-2ca8-4b06-814c-c4236bb81af0?source=api-prod
FAQ
Common Questions.
The Paid Memberships Pro plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in the 'pmpro_paypalexpress_session_vars_for_user_fields' function in versions up to, and including, 2.12.3.
Affected: Paid Memberships Pro (Strangerstudios); Paid Memberships Pro – Content Restriction, User Registration, & Paid Subscriptions. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Paid Memberships Pro 2.12.4, Paid Memberships Pro 2.12.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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