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NVD / CVE Program· CNA WPScan

CVE-2025-2594: User Registration & Membership < 4.1.3 - Authentication Bypass

Noroxi assessment

Priority: Monitor (action score 35/100)

  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 9.5% (FIRST EPSS); higher than 95.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Unknown User Registration & Membership 4.1.3.

Low priority for now. Upgrade to Unknown User Registration & Membership 4.1.3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The User Registration & Membership WordPress plugin before 4.1.3 does not properly validate data in an AJAX action when the Membership Addon is enabled, allowing attackers to authenticate as any user, including administrators, by simply using the target account's user ID.

HighCVSS 8.1 · v3.1—Proof of concept Fix available
Published
Apr 22, 2025
Updated
Jun 17, 2026
EPSS
9.5% · 95th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
3 / 30 · 9.5%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Is User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder on your site?

WP Lens reads your site's plugin, theme and WordPress versions from the outside and matches them to known vulnerabilities. Works without an account.

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Is User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder on your site?

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  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
wpeverestuser registration \& membership

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • wpeverest user registration & membershipbefore 4.1.3
  • wpeverest user registration & membershipbefore 5.1.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (WPScan). Independent of NVD's CPE analysis and usually ahead of it.

  • Unknown User Registration & Membership

    • before 4.1.3affected · semver

Same product

wpeverest: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-2563User Registration & Membership < 4.1.2- Unauthenticated Privilege Escalation
    60This week
  • CVE-2023-27459WordPress User Registration plugin <= 2.3.2.1 - Authenticated PHP Object Injection vulnerability
    35Monitor
  • CVE-2025-39400WordPress User Registration plugin < 4.2.0 - Reflected Cross Site Scripting (XSS) vulnerability
    24Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-30899Mar 27, 2025 · WordPress User Registration plugin <= 4.0.3 - Cross Site Scripting (XSS) vulnerability
    19Monitor
  • ← EarlierCVE-2025-3282Apr 12, 2025 · User Registration & Membership – Custom Registration Form, Login Form, and User Profile <= 4.1.3 - Insecure Direct Object Reference to Unauthenticated Membershi
    21Monitor
  • ← EarlierCVE-2025-3292Apr 12, 2025 · User Registration & Membership – Custom Registration Form, Login Form, and User Profile <= 4.1.3 - Insecure Direct Object Reference to Authenticated (Subscriber
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Unknown User Registration & Membership4.1.3Vendor (CNA)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2025-05-25
Proof-of-concept repository on GitHubstars:02025-04-02

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-20 d
  2. Published
  3. TodayNov 9, 2026+566 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-25638 days apartUser Registration & Membership < 4.1.2- Unauthenticated Privilege Escalation
    60This week
  • CVE-2025-328210 days apartUser Registration & Membership – Custom Registration Form, Login Form, and User Profile <= 4.1.3 - Insecure Direct Object Reference to Unauthenticated Membershi
    21Monitor
  • CVE-2025-329210 days apartUser Registration & Membership – Custom Registration Form, Login Form, and User Profile <= 4.1.3 - Insecure Direct Object Reference to Authenticated (Subscriber
    17Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-639 · Authorization Bypass Through User-Controlled Key

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

The bug in code

The whole CWE-639 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
const invoice = await Invoice.findById(req.params.id);res.json(invoice);

Fixed

ts
const invoice = await Invoice.findOne({  id: req.params.id,  ownerId: req.user.id,});if (!invoice) return res.sendStatus(404);res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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