Yml For Yandex Market - Security Vulnerability (CVE-2026-120548)

Q: Am I affected by this vulnerability?

You are affected if your site runs Yml For Yandex Market. No account is needed to exploit this, so a public site is reachable by anyone.

Q: How do I fix it?

Update Yml For Yandex Market to the latest available version. Where the vendor has not yet published a fix, remove or disable the plugin until they do. Until you can update, Restrict REST API in Hack Halt Pro contains this class of attack at the request layer.

Q: What can an attacker actually do?

This is a Information Disclosure flaw. An attacker who exploits it can read data they were never meant to see, which is often the first step in a larger attack.

CVE-2026-120548

Vulnerability CVE-2026-120548 PLUGIN yml-for-yandex-market MEDIUM

The YML for Yandex Market plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 5.10.0 via the 'y4ym_check_action' parameter. This makes it possible for unauthenticated attackers to extract the merchant's plaintext Yandex Market API key written to the publicly accessible log file at wp-content/uploads/y4ym/yml-for-yandex-market.log, granting full control over the merchant's marketplace catalogue, prices, and stock. Exploitation requires that the targeted feed has a stored Yandex Market API key and that the y4ym_keeplogs option is enabled — both conditions that represent normal, documented plugin usage actively encouraged by the plugin's own support and feedback workflow.

CVE-2026-120548

MEDIUM CVSS 5.3 Published 2026-11-07 Updated 2026-11-08

AI Risk Elevated (60/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P3 Priority

Severity Band MEDIUM

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

Affected Components 1

Reference Links 5

AI Risk Engine Elevated (60/100)

Exploitability High

Active Exploitation No strong signal

Published Exploit Status No public exploit references

Threat Timeline

2026-11-07 CVE published and first recorded in the threat feed.
2026-11-08 Record updated with latest vulnerability metadata.
2026-11-08 AI technical context refreshed for mitigation and impact guidance.
Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 3 days ago

AI enriched 3 days ago (2026-11-08 23:32 UTC)

Technical Summary

Potential Impact

Severity is MEDIUM (CVSS 5.3). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as High based on remote code execution potential, low-bar exploit prerequisites.

Primary risk drivers: remote code execution potential, low-bar exploit prerequisites

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

AI risk score 60/100 (Elevated, High) with priority P3 Priority. Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

Yml For Yandex Market PLUGIN · yml-for-yandex-market Affected: <= 5.10.0 Fixed version not specified

References

What to do about this

Patch promptly The consequence is significant even where an attacker needs a foothold first.

Fix it

Update Yml For Yandex Market to the latest available version.

Where the vendor has not published a fix yet, disable the plugin until they do.

Cannot update today? Restrict REST API in Hack Halt Pro blocks this class of attack before WordPress processes the request.

Require authentication for REST namespaces that do not need to be public, so the API cannot be used to enumerate content and accounts.

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