Contradiction with Matthew 5:15
This verse encourages not to hide one's light, symbolizing exposing good works, whereas Ephesians 5:12 suggests refraining from even speaking of certain shameful acts.
Matthew 5:15: Neither do men light a candle, and put it under a bushel, but on a candlestick; and it giveth light unto all that are in the house. [a bushel: the word in the original signifieth a measure containing about a pint less than a peck]
Contradiction with 1 Corinthians 14:40
Urges doing all things decently and in order, possibly allowing discussion of issues to achieve order, while Ephesians 5:12 advises silence on shameful acts.
1 Corinthians 14:40: Let all things be done decently and in order.
Contradiction with Galatians 6:1
Encourages believers to restore others gently when caught in sin, implying discussing the sin, which contrasts with Ephesians 5:12's admonition to not even speak of shameful deeds.
Galatians 6:1: Brethren, if a man be overtaken in a fault, ye which are spiritual, restore such an one in the spirit of meekness; considering thyself, lest thou also be tempted. [if: or, although]
Contradiction with 1 Corinthians 5:11
Instructs not to associate with certain sinners, which necessitates identifying and speaking of their acts, contrasted with the advice in Ephesians 5:12 to avoid speaking of such things.
1 Corinthians 5:11: But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.