Sheffield United off the bottom of the Premiership table as the Blades beat Newcastle United 1-0 at St James' Park.
Webber - who missed from the penalty spot against Chelsea last week - pounced for the all-important winner after 68 minutes as Neil Warnock's side scored their first top-flight goal away from Bramall Lane in 12 years.
And it was no more than the Blades deserved as powder-puff Newcastle failed to manage a shot of any merit on Paddy Kenny's goal.
It's now crisis time for Newcastle who are firmly in the relegation zone, and it could have been worse as only the woodwork prevented Alan Quinn making it 2-0 when his late effort crashed against the upright.
Newcastle's fans made their feelings known before and after the final whistle as they turned on chairman Freddy Shepherd.
Chants of "Shepherd out" reverberated around the stadium and were carried on outside of the main entrance at St James' Park as hoardes of disgruntled fans vented their anger on the chairman.
However, what most fans did not know was that Shepherd was actually out of the country, although details of the demonstration will soon have filtered through to him in Spain where he is with his ill wife.
This was Newcastle's second match in less than 48 hours although the side bore little resemblance to Thursday's 1-0 UEFA Cup winning outfit in Palermo.
Albert Luque - the match-winner that night - had to be content with a place on the bench as Glenn Roeder made six changes.
Man of the match Tim Krul was not involved and neither was Stephen Taylor while Nobby Solano, Emre and Peter Ramage were also on the bench and of course Steve Harper returned in goal.
The omens were not good for Newcastle. In the previous 11 games Steve Bennett had officiated in, Newcastle had managed a solitary win - and that record has now stretched to a dozen.
The first half was instantly forgettable as Newcastle failed to muster one solitary effort to trouble Kenny.
At least Sheffield United chased and harried for every ball with Rob Hulse posing an aerial threat that caused plenty of problems.
An early break from Webber saw him go clear on the right but his cross was scrambled away and Hulse hit an edge of the box volley straight at Harper.
Kenny did spill a James Milner corner but Damien Duff could not react quickly enough while a Nicky Butt lay-off to Charles N'Zogbia saw the Frenchman's cross land on top of the bar.
Newcastle continued to be woeful in the second half after hauling off both N'Zogbia and Butt and were undone when Rob Kozluk's whipped-in cross from the right, saw the stooping Webber head beyond Harper.
It could have been worse when Quinn broke free only for Harper to see the ball hit the upright and rebound into the arms of the keeper.