NVD / CVE Program· CNA Patchstack

CVE-2023-51471: WordPress Checkout Mestres WP plugin <= 7.1.9.7 - Unauthenticated Arbitrary Options Update vulnerability

Noroxi assessment

Priority: Monitor (action score 32/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.55% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: Mestres do WP Checkout Mestres WP 7.1.9.8.

Low priority for now. Upgrade to Mestres do WP Checkout Mestres WP 7.1.9.8 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

Improper Authentication vulnerability in Mestres do WP Checkout Mestres WP allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects Checkout Mestres WP: from n/a through 7.1.9.7.

HighCVSS 8.2 · v3.1—No exploit Fix available

Published: Apr 24, 2024
Updated: Jun 17, 2026
EPSS: 0.5% · 46th percentile
CWE: CWE-287

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 32 / 40 · 8.2 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Patchstack: 8.2; NVD has not scored this yet; the score shown is the CNA’s.

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

Is Checkout Mestres do WP for WooCommerce on your site?

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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.

Vendor	Product	CPE
wordpress	checkout mestres	cpe:2.3:a:wordpress:checkout_mestres

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.

Mestres do WP Checkout Mestres WP
- n/a and later · up to and including 7.1.9.7affectedfixed in 7.1.9.8

Same product

mestres do wp: all records

Other highest-scoring records for the same primary product.

CVE-2025-32695WordPress Checkout Mestres WP plugin <= 8.7.5 - Privilege Escalation Vulnerability
39Monitor
CVE-2023-51472WordPress Checkout Mestres WP plugin <= 7.1.9.7 - Unauthenticated Account Takeover vulnerability
39Monitor
CVE-2024-44030WordPress Checkout Mestres WP plugin <= 8.6 - Local File Inclusion vulnerability
28Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Mestres do WP Checkout Mestres WP	7.1.9.8	Vendor (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.

Rafie Muhammad (Patchstack)finder

Variant candidates

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

CVE-2023-514720 days apartWordPress Checkout Mestres WP plugin <= 7.1.9.7 - Unauthenticated Account Takeover vulnerability
39Monitor

Chain candidates

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

CVE-2024-44030161 days apartWordPress Checkout Mestres WP plugin <= 8.6 - Local File Inclusion vulnerability
28Monitor

Bug bounty scope

WordPressHackerOne · paid

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

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.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: high · data or configuration can be modified
Availability: low · the service can be disrupted

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

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

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

nvd-secondary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

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

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

Change log

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

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References

patchstack.com/database/vulnerability/checkout-mestres-wp/wordpress-checkout-mestres-wp-plugin-7-1-9-6-unauthenticated-arbitrary-options-update-vulnerability?_s_id=cve

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

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