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CVE-2025-28970: WordPress WP Optimize By xTraffic plugin <= 5.1.6 - PHP Object Injection Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-27 · updated 2026-06-17
• Weakness: CWE-502

Description

Deserialization of Untrusted Data vulnerability in pep.vn WP Optimize By xTraffic wp-optimize-by-xtraffic allows Object Injection.This issue affects WP Optimize By xTraffic: from n/a through <= 5.1.6.

Affected products

• pep.vn WP Optimize By xTraffic: through 5.1.6

References

• https://patchstack.com/database/Wordpress/Plugin/wp-optimize-by-xtraffic/vulnerability/wordpress-wp-optimize-by-xtraffic-5-1-6-php-object-injection-vulnerability?_s_id=cve

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