CVE-2025-8621

The Mosaic Generator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the c parameter in all versions up to, and including, 1.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Basic XSS
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
WordfenceCNA
6.4 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CISA-ADPADP
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Common Weakness Enumeration
References
https://wordpress.org/plugins/mosaic-generator/#developers
https://www.wordfence.com/threat-intel/vulnerabilities/id/91c87d34-ef9a-42f4-b11a-7c5a5c842550?source=cve