icopydoc YML for Yandex Market Plugin up to 5.10.0 on WordPress yml-for-yandex-market.log y4ym_check_action information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in icopydoc YML for Yandex Market Plugin up to 5.10.0. This vulnerability affects unknown code of the file wp-content/uploads/y4ym/yml-for-yandex-market.log. Such manipulation of the argument y4ym_check_action leads to information disclosure. This vulnerability is uniquely identified as CVE-2026-120548. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in icopydoc YML for Yandex Market Plugin up to 5.10.0. It has been rated as problematic. Affected by this issue is an unknown part of the file wp-content/uploads/y4ym/yml-for-yandex-market.log. The manipulation of the argument y4ym_check_action with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-120548 since 11/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/07/2026). The MITRE ATT&CK project declares the attack technique as T1592.

By approaching the search of inurl:wp-content/uploads/y4ym/yml-for-yandex-market.log it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-119032). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• WordPress Plugin

Vendor

• icopydoc

Name

• YML for Yandex Market Plugin

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion