{"id":1581,"date":"2026-06-12T08:08:00","date_gmt":"2026-06-12T08:08:00","guid":{"rendered":"https:\/\/newblog.siteground.com\/fr\/?p=1581"},"modified":"2026-06-23T12:28:12","modified_gmt":"2026-06-23T12:28:12","slug":"vulnerabilite-critique-updraftplus-corrigee","status":"publish","type":"post","link":"https:\/\/fr.siteground.com\/blog\/vulnerabilite-critique-updraftplus-corrigee\/","title":{"rendered":"Faille critique d&#8217;UpdraftPlus corrig\u00e9e sur tous les sites WordPress h\u00e9berg\u00e9s chez SiteGround"},"content":{"rendered":"\n<p>Si votre site utilise le plugin de sauvegarde UpdraftPlus, voici l&#8217;essentiel : une faille critique a \u00e9t\u00e9 d\u00e9couverte dans le plugin, et nous l&#8217;avons d\u00e9j\u00e0 mis \u00e0 jour vers la version corrig\u00e9e sur tous les sites affect\u00e9s que nous h\u00e9bergeons. Vous \u00eates prot\u00e9g\u00e9 et vous n&#8217;avez rien \u00e0 faire.<\/p>\n\n\n\n<p>Voici ce qui s&#8217;est pass\u00e9, ce que nous avons fait et ce qu&#8217;il convient de surveiller.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-votre-site-est-deja-protege\"><span class=\"ez-toc-section\" id=\"Votre_site_est_deja_protege\"><\/span><strong>Votre site est d\u00e9j\u00e0 prot\u00e9g\u00e9<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Le 11 juin 2026, notre \u00e9quipe d&#8217;ing\u00e9nieurs a forc\u00e9 la mise \u00e0 jour du plugin UpdraftPlus sur tous les sites h\u00e9berg\u00e9s utilisant une version vuln\u00e9rable. Chaque installation affect\u00e9e a \u00e9t\u00e9 mise \u00e0 jour vers la version 1.26.5, qui contient le correctif officiel. Plus de 128 000 sites sur notre plateforme utilisaient une version vuln\u00e9rable, et tous ont \u00e9t\u00e9 corrig\u00e9s.<\/p>\n\n\n\n<p>Nous avons test\u00e9 les chemins de mise \u00e0 jour avant tout d\u00e9ploiement et n&#8217;avons constat\u00e9 aucun probl\u00e8me. Nous ne pr\u00e9voyons aucune perturbation de site \u00e0 la suite de cette mise \u00e0 jour.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-en-quoi-consiste-la-faille\"><span class=\"ez-toc-section\" id=\"En_quoi_consiste_la_faille\"><\/span><strong>En quoi consiste la faille<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La faille, suivie sous <a href=\"https:\/\/www.cve.org\/CVERecord?id=CVE-2026-10795\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">CVE-2026-10795<\/a>, est un contournement d&#8217;authentification non authentifi\u00e9 affectant les versions d&#8217;UpdraftPlus jusqu&#8217;\u00e0 1.26.4. En termes simples, elle permettait aux attaquants d&#8217;obtenir un acc\u00e8s administrateur \u00e0 un site WordPress sans conna\u00eetre de nom d&#8217;utilisateur ou de mot de passe. \u00c0 partir de l\u00e0, ils pouvaient ex\u00e9cuter du code sur le site, ce qui est aussi grave qu&#8217;une vuln\u00e9rabilit\u00e9 de plugin puisse l&#8217;\u00eatre.<\/p>\n\n\n\n<p>L&#8217;aspect \u00ab non authentifi\u00e9 \u00bb est ce qui rend cette faille critique. De nombreuses vuln\u00e9rabilit\u00e9s exigent qu&#8217;un attaquant dispose d\u00e9j\u00e0 d&#8217;un certain niveau d&#8217;acc\u00e8s, comme un compte abonn\u00e9 ou contributeur. Celle-ci ne n\u00e9cessitait absolument rien. Tout site utilisant une version vuln\u00e9rable \u00e9tait expos\u00e9 \u00e0 quiconque connaissait la faille.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ce-que-nous-avons-fait-et-quand-nbsp\"><span class=\"ez-toc-section\" id=\"Ce_que_nous_avons_fait_et_quand\"><\/span><strong>Ce que nous avons fait et quand&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>D\u00e8s la divulgation de la vuln\u00e9rabilit\u00e9, notre \u00e9quipe a mis moins d&#8217;une heure pour d\u00e9ployer de mani\u00e8re proactive la version corrig\u00e9e du plugin sur tous les sites affect\u00e9s, agissant imm\u00e9diatement pour fermer la fen\u00eatre d&#8217;exposition avant que les attaquants ne puissent l&#8217;exploiter \u00e0 grande \u00e9chelle, plut\u00f4t que d&#8217;attendre que les propri\u00e9taires de sites effectuent la mise \u00e0 jour manuellement ou soient affect\u00e9s de quelque mani\u00e8re que ce soit.<\/p>\n\n\n\n<p>Voici \u00e0 quoi ressemblait la r\u00e9ponse :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nous avons identifi\u00e9 tous les sites h\u00e9berg\u00e9s ex\u00e9cutant les versions 1.24.x, 1.25.x et 1.26.x d&#8217;UpdraftPlus.<\/li>\n\n\n\n<li>Nous avons test\u00e9 les mises \u00e0 jour de 1.24.x \u00e0 1.26.x et d&#8217;autres versions affect\u00e9es \u00e0 1.26.5 \u00e0 l&#8217;avance pour confirmer que la mise \u00e0 jour ne causerait pas de probl\u00e8mes.<\/li>\n\n\n\n<li>Nous avons mis \u00e0 jour de force plus de 128 000 installations affect\u00e9es vers la version corrig\u00e9e 1.26.5.<\/li>\n\n\n\n<li>Le processus complet a \u00e9t\u00e9 achev\u00e9 en environ 52 minutes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-la-mise-a-jour-affectera-t-elle-mon-site-web\"><span class=\"ez-toc-section\" id=\"La_mise_a_jour_affectera-t-elle_mon_site_web\"><\/span><strong>La mise \u00e0 jour affectera-t-elle mon site web ?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nous ne nous y attendons pas. Les mises \u00e0 jour du plugin entre ces versions ont \u00e9t\u00e9 test\u00e9es avant le d\u00e9ploiement, et aucun probl\u00e8me n&#8217;est apparu.<\/p>\n\n\n\n<p>Cela dit, si vous souhaitez une tranquillit\u00e9 d&#8217;esprit suppl\u00e9mentaire, voici deux choses rapides que vous pouvez v\u00e9rifier :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Confirmez que votre calendrier de sauvegarde dans UpdraftPlus est toujours configur\u00e9 comme vous l&#8217;avez d\u00e9fini.<\/li>\n\n\n\n<li>V\u00e9rifiez que votre sauvegarde la plus r\u00e9cente a \u00e9t\u00e9 compl\u00e9t\u00e9e avec succ\u00e8s.<\/li>\n<\/ul>\n\n\n\n<p>Les deux prennent moins d&#8217;une minute depuis votre tableau de bord WordPress.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pourquoi-nous-forcons-les-mises-a-jour-pour-les-failles-critiques\"><span class=\"ez-toc-section\" id=\"Pourquoi_nous_forcons_les_mises_a_jour_pour_les_failles_critiques\"><\/span><strong>Pourquoi nous for\u00e7ons les mises \u00e0 jour pour les failles critiques<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lorsqu&#8217;une vuln\u00e9rabilit\u00e9 est critique, facilement exploitable et divulgu\u00e9e publiquement, chaque heure de retard compte. Les attaquants commencent \u00e0 rechercher des sites vuln\u00e9rables dans les heures qui suivent une divulgation comme celle-ci, et attendre que chaque propri\u00e9taire de site mette \u00e0 jour manuellement laisserait des milliers de sites expos\u00e9s entre-temps.<\/p>\n\n\n\n<p>Dans ces situations, nous corrigeons d&#8217;abord et notifions juste apr\u00e8s. Nous croyons qu&#8217;une mise \u00e0 jour proactive est toujours le meilleur compromis par rapport \u00e0 laisser les sites ouverts \u00e0 une prise de contr\u00f4le compl\u00e8te.<\/p>\n\n\n\n<p>En r\u00e8gle g\u00e9n\u00e9rale, nous recommandons \u00e9galement de garder les <a href=\"https:\/\/fr.siteground.com\/tutorials\/wordpress\/tutoriel-de-loutil-siteground-autoupdate\/\" target=\"_blank\" rel=\"noreferrer noopener\">mises \u00e0 jour automatiques<\/a> des plugins activ\u00e9es autant que possible. C&#8217;est l&#8217;habitude la plus efficace pour rester en avance sur les vuln\u00e9rabilit\u00e9s comme celle-ci.<\/p>\n","protected":false},"excerpt":{"rendered":"Si votre site utilise le plugin de sauvegarde UpdraftPlus, voici l'essentiel : une faille critique a \u00e9t\u00e9 d\u00e9couverte dans le plugin, et nous l'avons d\u00e9j\u00e0 mis \u00e0 jour vers la version corrig\u00e9e sur tous les sites affect\u00e9s que nous h\u00e9bergeons. Vous \u00eates prot\u00e9g\u00e9 et vous n'avez rien \u00e0 faire. Voici ce qui s'est pass\u00e9, ce&hellip;","protected":false},"author":136,"featured_media":1582,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,6],"tags":[12],"class_list":["post-1581","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-securite","category-wordpress","tag-user-area-display"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Faille critique d&#039;UpdraftPlus corrig\u00e9e sur tous les sites WordPress h\u00e9berg\u00e9s chez SiteGround<\/title>\n<meta name=\"description\" content=\"Une vuln\u00e9rabilit\u00e9 critique d\u2019UpdraftPlus a \u00e9t\u00e9 corrig\u00e9e sur tous les sites WordPress h\u00e9berg\u00e9s chez SiteGround. 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