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CVE-2025-30899· NVD / CVE Program· CNA Patchstack

WordPress User Registration plugin <= 4.0.3 - Cross Site Scripting (XSS) vulnerability

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpeverest User Registration user-registration allows Stored XSS.This issue affects User Registration: from n/a through <= 4.0.3.

MediumCVSS 4.8 · v3.1—No exploit Fix available

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Published
Mar 27, 2025
Updated
Jun 17, 2026
EPSS
0.3% · 21th percentile
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Report tools

JSON

Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
4.8
CNA · Patchstack
5.9
1.1 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

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 4.0.4
  • wpeverest user registration & membershipbefore 5.0.4

Versions reported by the vendor

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

  • wpeverest User Registration

    • up to and including 4.0.3affectedfixed in 4.0.4

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
    47Plan
  • CVE-2025-2594User Registration & Membership < 4.1.3 - Authentication Bypass
    35Monitor
  • 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
  • CVE-2024-1720User Registration – Custom Registration Form, Login Form, and User Profile WordPress Plugin <= 3.1.4 - Unauthenticated Stored Self-Based Cross-Site Scripting
    24Monitor
  • CVE-2025-3282User Registration & Membership – Custom Registration Form, Login Form, and User Profile <= 4.1.3 - Insecure Direct Object Reference to Unauthenticated Membershi
    21Monitor

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
wpeverest User Registration4.0.4Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

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-2025-3940028 days apartWordPress User Registration plugin < 4.2.0 - Reflected Cross Site Scripting (XSS) vulnerability
    24Monitor
  • CVE-2024-1720385 days apartUser Registration – Custom Registration Form, Login Form, and User Profile WordPress Plugin <= 3.1.4 - Unauthenticated Stored Self-Based Cross-Site Scripting
    24Monitor

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.
  • Administrator privileges are required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

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

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

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

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records