4.1.7 Security Vulnerability?

Hello,

I am currently using version 4.1.7 on all my sites (4.x series).

I recently received the following vulnerability notification from Wordfence:
https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/backwpup/backwpup-562-authenticated-backwpup-helper-privilege-escalation-via-arbitrary-options-update

Since I am still running the 4.x series, I would like to ask:

• Does this vulnerability affect version 4.1.7 (or the 4.x branch in general)?
• If so, is this considered a real and exploitable security issue in that branch?
• Is there any plan to provide a fix for the 4.x series, or is upgrading to the latest major version the only recommended solution?

I am aware that there are still many users running the 4.x series, so clarification on this would be greatly appreciated.