13 For such people are false apostles, deceitful workers, masquerading as apostles of Christ.

Read 2 Corinthians 11:13 Using Other Translations

For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.
For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ.
These people are false apostles. They are deceitful workers who disguise themselves as apostles of Christ.