YML for Yandex Market <= 5.10.0 - Unauthenticated Sensitive Information Exposure through Log File via 'y4ym_check_action' Parameter via admin-post.php

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-120548
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-07 10:17:09 UTC
Updated2026-11-08 19:17:36 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

EPSS: 0.003150000 probability, percentile 0.246330000 (date 2026-11-09)

Problem Types: CWE-532 | CWE-532 CWE-532 Insertion of Sensitive Information into Log File

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Icopydoc YML For Yandex Market affected 5.10.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/yml-for-yandex-market/tags/5.10.0/admin/class-y4ym-ad... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/yml-for-yandex-market/tags/5.10.0/includes/feeds/impo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/yml-for-yandex-market/tags/5.10.0/includes/core/class... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/33a2cf5c-d71f-45cf-8f8a-0edd4... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Kuba (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-11-06T21:24:33.000ZDisclosed

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