ecrire/public/assembler.php in SPIP before 4.1.13 and 4.2.x before 4.2.7 allows XSS because input from _request() is not restricted to safe characters such as alphanumerics.
{ "binaries": [ { "binary_version": "3.0.21-1ubuntu1", "binary_name": "spip" } ] }
{ "binaries": [ { "binary_version": "3.1.4-4~deb9u5ubuntu0.1~esm2", "binary_name": "spip" } ] }
{ "binaries": [ { "binary_version": "3.2.7-1ubuntu0.1+esm2", "binary_name": "spip" } ] }
{ "binaries": [ { "binary_version": "4.0.4-1", "binary_name": "spip" } ] }