'The mods in question, which have been banned, are 'Network Extensions 3' and 'Update from Github'. 'We recently banned a few mods from the Cities: Skylines Workshop and want to clear up some of the misinformation surrounding these mods,' Paradox wrote. In short, the situation is not perhaps as dire as it was feared. The blog, posted via Steam, details the issues it has found with the dodgy mods in question, and thanks fans for being alert to potential issues.
UPDATE 15/2/22: Cities Skylines developer Paradox has issued a statement on the weekend's warnings surrounding several mods.