In a New York Times expose, 15 current and former male models who worked with Weber, described a pattern of what they said was "unnecessary nudity and coercive sexual behaviour, often during photo shoots".
The men said, during the private sessions, Weber asked them to undress and led them through breathing and "energy" exercises. According to the models, they were asked to breathe and to touch both themselves and Weber, moving their hands wherever they felt their "energy."
In incidents going back to the mid-1990s, 13 male assistants and models, who have worked with Testino, told the publication that he subjected them to sexual advances, which in some cases included groping and masturbation.
Ryan Locke, a model who worked with Testino on Gucci campaigns, described him as a "sexual predator".
More From This Section
Representatives for both photographers denied the allegations and said they were shocked by the claims.
Lavely & Singer, a law firm that represents Testino, questioned the credibility of people who complained of harassment, and also wrote that it had spoken to several former employees who were "shocked by the allegations" and that they "could not confirm any of the claims."
Testino, a favourite of the English royal family and Vogue, was the man who immortalised the engagement of Prince William and Kate Middleton. In 2014, he received an OBE.
He recently photographed the February cover of Vogue, featuring Serena Williams and her daughter.
Artistic director Anna Wintour, who is also Vogue's editor-in-chief, said in a statement that the claims had "been hard to hear and heartbreaking to confront".
In a separate statement, Wintour and Conde Naste chief Bob Sauerberg also said they were "deeply disturbed" by the accusations.