Ce mail provient de l'extérieur, restons vigilants ===================================================================== CERT-Renater Note d'Information No. 2026/VULN832 _____________________________________________________________________ DATE : 10/08/2026 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running WordPress versions prior to 7.0.3. ===================================================================== https://wordpress.org/news/2026/08/wordpress-7-0-3-release/ https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-52p2-r8wf-jcrf _____________________________________________________________________ WordPress 7.0.3 is now available WordPress 7.0.3 is now available which features several security fixes. Because this is a security release, it is recommended that you update your sites immediately. You can update to WordPress 7.0.3 by downloading it from WordPress.org, or visiting your site’s Dashboard → Updates and clicking Update Now. Sites that support automatic background updates will begin updating shortly. For more information, please visit the WordPress 7.0.3 HelpHub site. Security updates included in this release The security team would like to thank the following people for responsibly reporting vulnerabilities and allowing them to be fixed in this release: Pre-auth reflected cross-site scripting (XSS) on the login screen with potential to lead to PHP code execution reported by the team at pwn.ai. Contributor+ stored cross-site scripting (XSS) in posts via the emoji settings element reported by Asaf Mozes (amosec) Contributor+ stored cross-site scripting (XSS) in the Post Content block reported by N05ec@LZU Contributor+ stored cross-site scripting (XSS) in Quick Edit on sites with a large number of users reported by Naveen S and Ajmal Moochingal Contributor+ stored cross-site scripting (XSS) in the Post Date block reported by Alex Concha of the WordPress Security Team A privilege escalation issue on multisite networks with user registration enabled, allowing a user to create a new site reported by Aikido Security An information disclosure issue in the Latest Comments block exposing comments on password-protected posts reported by Ehtisham Siddiqui of the WordPress Security Team Enumeration of post slugs reported by HDWSec Disclosure of notes in comment feeds reported by Elio Gubser Author+ CSS injection via a bypass of the safe CSS attribute filter reported by Anthropic Bypass of the email address confirmation flow reported by Omar Hasan A server-side request forgery (SSRF) issue in URL validation allowing requests to link-local ranges reported by Andrew Mohawk and multiple independent reporters Backports As a courtesy, these fixes are being backported, where necessary, to all branches eligible to receive security fixes (currently through 4.7). As a reminder, only the most recent version of WordPress is actively supported. The backports are in progress and will ship as they become ready. WordPress 7.1 RC2 has also been released, containing all applicable fixes. CVE and GHSA references Details of the login screen XSS vulnerability can be found in the advisory: CVE-2026-64638 / GHSA-52p2-r8wf-jcrf. Thank you to these WordPress contributors This release was led by John Blackbourn. In addition to the security researchers mentioned above, WordPress 7.0.3 and its backports would not have been possible without the significant contributions of the following people: Aaron D. Campbell, Aaron Jorbin, Adam Silverstein, adrianmoldovanwp, Aki Hamano, Alex Concha, Andrew Duthie, Andrew Serong, annezazu, Barry, Bernie Reiter, Daniel, Daniel Richards, David Biňovec, Dennis Snell, Ehtisham Siddiqui, Erwan Le Rousseau, Fabian Kaegy, fiocavallari, George Mamadashvili, gubser, Isabel Brison, Jarda Snajdr, Jb Audras, Jeremy Felt, Joe Dolson, Joe Hoyle, John Blackbourn, Jon Surrell, Jonathan Desrosiers, Khokan Sardar, Lance Willett, lucasbustamante, lucatume, Marco Ciampini, Marin Atanasov, Mohammad Jangda, Mukesh Panchal, Paul Kevan, Peter Wilson, ramonopoly, SergeyBiryukov, vortfu, Weston Ruter _____________________________________________________________________ Pre-auth reflected XSS on login screen with potential to lead to PHP code execution High johnbillion published GHSA-52p2-r8wf-jcrf Package WordPress (WordPress) Affected versions 7.0.0 - 7.0.2 6.9.0 - 6.9.5 6.8.0 - 6.8.6 6.7.0 - 6.7.5 6.6.0 - 6.6.5 6.5.0 - 6.5.8 6.4.0 - 6.4.8 6.3.0 - 6.3.8 6.2.0 - 6.2.9 6.1.0 - 6.1.10 6.0.0 - 6.0.12 5.9.0 - 5.9.13 5.8.0 - 5.8.13 5.7.0 - 5.7.15 5.6.0 - 5.6.17 5.5.0 - 5.5.18 5.4.0 - 5.4.19 5.3.0 - 5.3.21 5.2.0 - 5.2.24 5.1.0 - 5.1.22 5.0.0 - 5.0.25 4.9.0 - 4.9.29 4.8.0 - 4.8.28 4.7.0 - 4.7.33 Patched versions 7.0.3 6.9.6 6.8.7 6.7.6 6.6.6 6.5.9 6.4.9 6.3.9 6.2.10 6.1.11 6.0.13 5.9.14 5.8.14 5.7.16 5.6.18 5.5.19 5.4.20 5.3.22 5.2.25 5.1.23 5.0.26 4.9.30 4.8.29 4.7.34 Description WordPress is vulnerable to a pre-auth reflected XSS vulnerability on the login screen. Via a specially crafted malicious third-party website hosted by an attacker, it is possible for this to be escalated to an RCE vulnerability with conditions outside of the attackers control. This requires successful social engineering of and explicit interaction by the target victim. This issue affects all versions of WordPress. Version 7.0.3 has been released, containing a fix for the vulnerability, and as a courtesy to users on older branches the fix has been backported to all branches back to 4.7. Discovered and responsibly disclosed by the team at pwn.ai. Full information about the WordPress 7.0.3 release can be found here: https://wordpress.org/news/2026/08/wordpress-7-0-3-release/. Severity High 8.9/ 10 CVSS v4 base metrics Exploitability Metrics Attack Vector Network Attack Complexity High Attack Requirements None Privileges Required None User interaction Active Vulnerable System Impact Metrics Confidentiality High Integrity High Availability High Subsequent System Impact Metrics Confidentiality High Integrity High Availability High CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVE ID CVE-2026-64638 Weaknesses No CWEs ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================