What countries voted for letting Saudi Arabia join the women rights commission? It happened so I would like to know what countries voted to make this possible.
According to the United Nations press release, the election was conducted using a secret ballot. In a secret ballot, there is no way to know who voted for a particular candidate.
To help you out a little, not every nation was capable of voting. The UN org chart shows that the Commission on the Status of Women is organized by the Economic and Social Council. You can find a list of current council members here. The voters must be on that list.
Wikipedia claims that geographic distribution is an important criteria for election, requiring:
thirteen members from Africa; eleven from Asia; nine from Latin America and Caribbean; eight from Western Europe and other States and four from Eastern Europe.
This is unsourced on wikipedia, and I haven't found the documents outlining how these elections are conducting it - so take all that with a healthy amount of skepticism. However, if it's true it helps explain the somewhat unusual choices in Commission members.