---
id: "CVE-2026-120548"
page: "https://infrastack.ai/live/CVE-2026-120548"
kind: "vulnerability"
aliases: ["CVE-2026-120548"]
title: "WordPress YML for Yandex Market plugin leaks merchant API key in public log"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["e-commerce", "package", "woocommerce", "wordpress", "yandex-market"]
not_affected_if: ["keeplogs-disabled", "no-api-key-stored", "plugin-not-installed"]
published_at: "2026-11-07T10:17:09+00:00"
first_seen_at: "2026-11-07T10:46:41+00:00"
updated_at: "2026-11-07T10:48:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120548", "first_seen_at": "2026-11-07T10:46:41+00:00"}]
exploit_sources: []
---

# WordPress YML for Yandex Market plugin leaks merchant API key in public log

Link for people: https://infrastack.ai/live/CVE-2026-120548 (this .md is for agents)

The YML for Yandex Market WordPress plugin, up to and including 5.10.0, writes the merchant's plaintext Yandex Market API key to a publicly readable log file when the keep-logs option is enabled. An unauthenticated attacker who reads that log gains full control over the merchant's marketplace catalogue, prices and stock.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the `YML for Yandex Market` plugin is installed and its version is `5.10.0` or lower
- Check whether the option `y4ym_keeplogs` is enabled in the plugin settings
- Request `wp-content/uploads/y4ym/yml-for-yandex-market.log` on the site and see whether it is publicly reachable and contains an API key

## Timeline

- 2026-11-07T10:46:41+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120548

## From the sources

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.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_