CVE-2026-120548 json
YML for Yandex Market <= 5.10.0 - Unauthenticated Sensitive Information Exposure through Log File via 'y4ym_check_action' Parameter via admin-post.php
published 5d ago modified 3d ago also EUVD-2026-119032
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3d ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- icopydoc YML for Yandex Market
Classification
- Weakness
-
- CWE-532 Insertion of Sensitive Information into Log File
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/33a2cf5c-d71f-45cf-8f8a-0edd47bc1974?source=cve
- plugins.trac.wordpress.org /browser/yml-for-yandex-market/tags/5.10.0/admin/class-y4ym-admin.php#L467
- plugins.trac.wordpress.org /browser/yml-for-yandex-market/tags/5.10.0/includes/feeds/import/class-y4ym-api.php#L580
- plugins.trac.wordpress.org /browser/yml-for-yandex-market/tags/5.10.0/includes/core/class-y4ym-error-log.php#L136
- plugins.trac.wordpress.org /changeset?reponame=&old=3774592%40yml-for-yandex-market&new=3774592%40yml-for-yandex-market
Sources
- CVE List CVE-2026-120548
- NVD CVE-2026-120548
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.