提交 #944383: aiyiyi121 SxDevOps 1.1 Privilege Escalation

SxDevOps UserSerializer includes is_superuser, is_staff, and is_active in Meta.fields, but read_only_fields only protects date_joined and last_login. The update() method iterates over all validated_data fields via setattr(), allowing any user with rbac.user.manage permission to set is_superuser=True on any account including their own, bypassing the entire RBAC permission system.

Vulnerable code in backend/rbac/serializers.py lines 122-164:
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = [..., 'is_superuser', 'is_staff', 'is_active', ...]
read_only_fields = ('date_joined', 'last_login') # NOT is_superuser!
def update(self, instance, validated_data):
for attr, value in validated_data.items():
setattr(instance, attr, value) # is_superuser=True gets set directly

Exploitation: PATCH /api/users/2/ {"is_superuser": true, "is_staff": true}

Impact: Complete RBAC bypass. Attackers can create backdoor superuser accounts and gain full system control.

• 来源: ⚠️ https://github.com/aiyiyi121/sxdevops/issues/16
• 用户: _lxf (UID 63911)
• 提交: 2026-08-24 04時48分 (27 日前)
• 管理: 2026-09-19 12時15分 (26 days later)
• 状态: 已接受
• VulDB条目: 407927 [aiyiyi121 SxDevOps 1.0/1.1 UserSerializer serializers.py update 权限提升]
• 积分: 20