The way Sorilea gave Verin the sleeping potion in plain sight at the very least speaks against the two of them knowing the other is DF (Sorilea would have given the mixture to Verin in private otherwise, and would at least never have mentionned it's potential lethality in front of others... if women started dying in their sleep, this would have raised suspicions).

About Cadsuane's wards, they were inverted. Sorilea in the scene looked the other way, but anyway she would not have seen anything as Cadsuane merely untied inverted weaves... We also know from Moiraine Myrddraal can sense "as a beacon" all wards which aren't made to hide something from a Myrrdraal. Brandon also said taught Elza and that it wasn't pleasant, and Brandon added that SH couldn't do it because of limitations to how much he can interact with reality. The bottomline is that there doesn't appear to be any motive to believe Cadsuane was betrayed by anyone but Elza. It was known by Rand's inner circle that she had taken and hid all the a'dam. She's even tested the female one with her followers...

For the rest, the "clues" that were brought up against Sorilea are most tenuous. She doesn't appear to have stirred the WO in the wrong direction at any time. Her alliance with Cadsuane isn't suspicious... they both sought to avoid Rand becoming too hard. Cadsuane was also right Sorilea's goals were somewhat different: Sorilea's focus was on saving the Aiel, Cadsuane's was on saving the world.

As for Bair, the clues are just as tenuous. In truth, the only very suspicious thing she's done is in chapter one of AMOL. She broke with the collegial nature of their little group, that used to reach agreement together before taking action. Now for some mysterious reason, Bair has decided to push aside the decision to send an apprentice to Rhuidean soon and instead of debating with the others if it would not be better to send a full WO to try to enter the columns a second time, she's made sure she'd to be the one to do that, and thus to be the first to reach Rhuidean by secretely asking Aviendha for a Gateway. Had she feared Amys or Sorilea wouldn't agree but think they should be the ones going, Bair would not have acted differently. In this light, the fact she obviously recognized the name Nakomi but chose to hide what she knew from Aviendha is also suspicious. It's as if Bair wanted to be sure she'd be the one in the position to have the last say on Aviendha's vision. Whatever happens to her there, whatever she sees for real (if anything), Bair's report will most likely be the one on which the WO base their final decisions.

That being said, it's terribly difficult to find clues... Both Sorilea and Bair are the top WO of their clan. Both their clans and clan chiefs are among those who supported Rand early. Neither clan is part of those that strayed later. Those two clan chiefs are very background characters, barely ever mentionned (and not referred to since LOC). Both WO played a key role in "saving Rand" through TGS (ie: Tam). Bair has shared an important dream with the other (she didn't have to). Bair fought a Forsaken in TAR with Egwene. Both trained Egwene - she got a lot from Sorilea's ways to lead. Nothing really stands out. Both Bair and Sorilea are with Amys among the WO reacting/adapting the best to the changes brought by Rand (the important WO who balked here and there and was brought back in line by the others was rather Melaine, and of course the Shaido). There's no sign that either Bair or Sorilea have done anything to foster the disgruntlement between Rand and the clans.

Verin found it obvious that Katerine had help escaping from the WO, and both Sorilea and Bair were in the camp... but they were along dozens of other WO and gai'shain...

Basically, if either of those two is a DF, she obviously has orders to remain hidden and not attract any attention until the LB starts. Whatever the plans of Moridin for the DF Aiel, it seems those plans will play out during TG (as it appears to be the case with the vast majority of DF, actually), and if he has someone as high standing as a WO or clan chief, he needs them to lead the rest.

In fact, the only clan we know to have harboured proven DF and to have been manipulated by the Shadow was the Shaido, a clan without allies, and considered corrupted by many Aiel. As unlikely as it sounds, it may be that the heart of Shadow beliefs among Aiel was always among the Shaido, that they were the only clan where the Shadow has spread to the clan structure (circles at sept and hold levels etc.), that for the other clans it's limited to individuals within the warrior societies, corrupted by Shaido DF from the same societies.

The best we might have is a potential endgame attempt by Moridin to have the Aiel break away from Rand and his plans on the eve of TG. That attempt may have been made using Aviendha. If Moridin has a top WO among his pawns, he would know she was about to be sent, then that was sent to Rhuidean. Her weird encounter with Nakomi, her second set of visions may have been arranged (I'm far from convinced myself, but I don't see any good reason to discount the possibility... ). And now, if Bair is the DF, she'll soon be in the position required to seriously influence what will happen next. She could return with exactly the right interpretation the Shadow wanted the Aiel to make of that vision, and all the authority of a WO (in the sense that it's doubtful after Bair the WO keep sending one WO after another to further test the ter'angreal - Bair's experience is likely to be the final straw determining how the WO will interpret it all and make their decisions. It's hard to see how this will play out.. Bair will spend a lot of time there, the decisions at Merrilor could all be taken when she returns. It would be more obvious if she returned early enough to influence decisions about the Seanchan. If Bair confirmed Aviendha's future, learning that following a peace imposed by Rand they resume their conquest, win, destroy Tar Valon and the Asha'man, destroy the Aiel could influence Egwene, Elayne and even Rand about the Seanchan. It would put great pressure on Rand to give up on any idea of an alliance with Fortuona. And this would serve the Shadow, as I'm fairly convinced the alliance Demandred doesn't want to happen at any cost is the one between Rand and the Seanchan (the Shadow did have big plans to prevent Aes Sedai and Asha'man to be major players with Rand... Mesaana at the WT keeping the AS totally divided, and Taim at the BT, plans that have largely failed for the WT while Taim's success is still up in the air, but Mesaana's demise is way too recent for the Shadow to have a new plan in motion. However, we know Moridin seeks to prevent an alliance with the Seanchan, it was part of his orders to Graendal. I'm pretty convinced from Murandy is about to attack the Seanchan, strong of a supposed alliance with the BT and WT Roedran would announce after he returns from Merrilor.. an alliance with Taim and the remnants of the BA in truth. To cover it all up, he would just have to make a lot of noise at Merrilor about his conviction the Seanchan are about to invade him, then leave in a show of anger when Rand and the nations refuse to get involved in this, and privately claims the Seanchan are Mat's businness now, that he has gone to Ebou Dar, and he will be the one bringing them to an alliance soon. News a little while later that Murandy has attacked the Seanchan wouldn't worry anyone in those circumstances, they would just say "what an idiot".. when in fact it would Demandred crippling the Seanchan, stealing and turning to the Shadow the surviving damane, before he turns his attention on Rand).