CVE-2025-34077
CVE-2025-34077 is a critical-severity vulnerability with a CVSS 4.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: Critical (CVSS 4.0 base score 10.0)
- EPSS exploit prediction: 10% (95th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-20764
- Weakness: CWE-94
- Published:
- Last modified:
Description
An authentication bypass vulnerability exists in the WordPress Pie Register plugin ≤ 3.7.1.4 that allows unauthenticated attackers to impersonate arbitrary users by submitting a crafted POST request to the login endpoint. By setting social_site=true and manipulating the user_id_social_site parameter, an attacker can generate a valid WordPress session cookie for any user ID, including administrators. Once authenticated, the attacker may exploit plugin upload functionality to install a malicious plugin containing arbitrary PHP code, resulting in remote code execution on the underlying server.
Frequently asked questions
- What is CVE-2025-34077?
- An authentication bypass vulnerability exists in the WordPress Pie Register plugin ≤ 3.7.1.4 that allows unauthenticated attackers to impersonate arbitrary users by submitting a crafted POST request to the login endpoint. By setting social_site=true and manipulating the user_id_social_site parameter, an attacker can generate a valid WordPress session cookie for any user ID, including administrators. Once authenticated, the attacker may exploit plugin upload functionality to install a malicious plugin containing arbitrary PHP code, resulting in remote code execution on the underlying server.
- How severe is CVE-2025-34077?
- CVE-2025-34077 has a CVSS 4.0 base score of 10.0, rated critical severity.
- Is CVE-2025-34077 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34077?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-34077 have an EU (EUVD) identifier?
- Yes. CVE-2025-34077 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20764.
- When was CVE-2025-34077 published?
- CVE-2025-34077 was published on 2025-07-09 and last updated on 2026-06-17.
References
- https://github.com/GTSolutions/Pie-Register
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/webapp/wp_pie_register_bypass_rce.rb
- https://pieregister.com/
- https://vulncheck.com/advisories/wordpress-pie-register-plugin-rce
- https://wordpress.org/plugins/pie-register/
- https://www.exploit-db.com/exploits/50395
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- CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.