The encoder_contexte_ajax function in ecrire/inc/filtres.php in SPIP 2.x before 2.1.19, 3.0.x before 3.0.22, and 3.1.x before 3.1.1 allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via a crafted serialized object.
SPIP 2.x before 2.1.19, 3.0.x before 3.0.22, and 3.1.x before 3.1.1 allows remote attackers to execute arbitrary PHP code by adding content, related to the filtrer_entites function.
Multiple cross-site scripting (XSS) vulnerabilities in (1) squelettes-dist/formulaires/inscription.php and (2) prive/forms/editer_auteur.php in SPIP before 2.1.25 and 3.0.x before 3.0.13 allow remote attackers to inject arbitrary web script or HTML via the author name field.
Cross-site request forgery (CSRF) vulnerability in ecrire/action/logout.php in SPIP before 2.1.24 allows remote attackers to hijack the authentication of arbitrary users for requests that logout the user via unspecified vectors.
Cross-site scripting (XSS) vulnerability in the author page (prive/formulaires/editer_auteur.php) in SPIP before 2.1.24 and 3.0.x before 3.0.12 allows remote attackers to inject arbitrary web script or HTML via the url_site parameter.
SPIP 3.0.x before 3.0.9, 2.1.x before 2.1.22, and 2.0.x before 2.0.23 allows remote attackers to gain privileges and "take editorial control" via vectors related to ecrire/inc/filtres.php.
SPIP 1.9 before 1.9.2i and 2.0.x through 2.0.8 does not use proper access control for (1) ecrire/exec/install.php and (2) ecrire/index.php, which allows remote attackers to conduct unauthorized activities related to installation and backups, as exploited in the wild in August 2009.
SQL injection vulnerability in inc/rubriques.php in SPIP 1.8 before 1.8.3b, 1.9 before 1.9.2g, and 2.0 before 2.0.2 allows remote attackers to execute arbitrary SQL commands via the ID parameter. NOTE: some of these details are obtained from third party information.