UserPro - Community and User Profile WordPress…: Improper Authentication
CVE-2023-2437 is a high-severity improper authentication vulnerability in UserPro - Community and User Profile WordPress Plugin, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected UserPro - Community and User Profile WordPress Plugin versions: 5.1.1 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 6.75% chance of exploitation within 30 days, which is in the top 5.93% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of UserPro - Community and User Profile WordPress Plugin you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| UserPro - Community and User Profile WordPress Plugin | UserPro - Community and User Profile WordPress Plugin | 5.1.1 and earlier | Not stated |
| Userproplugin | Userpro | 5.1.1 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | CNA (wordfence.com) |
| CVSS 3.1 | 8.1 | High | NVD |
Official description
The UserPro plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 5.1.1. This is due to insufficient verification on the user being supplied during a Facebook login through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email. An attacker can leverage CVE-2023-2448 and CVE-2023-2446 to get the user's email address to successfully exploit this vulnerability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
Technical write-ups (may include proof of concept)
- packetstormsecurity.com/files/175871/WordPress-UserPro-5.1.x-Password-Reset-Authentication-Bypass-Escalation…Exploit, Third Party Advisory, VDB Entry
Other references
Other vulnerabilities in UserPro - Community and User Profile WordPress Plugin
- 8.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 8.8 High severity
Recent Improper Authentication vulnerabilities
- 9.8 Critical severity
ownCloud Improper Authentication Exploited
- 9.8 Critical severity
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- 9.8 Critical severity
- 7.8 High severity
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