New iOS Mail Bug Allows iCloud-Like Popups to Steal User Passwords - GeekWebGuides
Skip to Content

New iOS Mail Bug Allows iCloud-Like Popups to Steal User Passwords

by

A new bug facing the iOS Mail app was found recently by security specialist Jan Soucek (via The Register). The malicious bug is capable of delivering false iCloud log-in prompts by allowing remote HTML content to be loaded through an email message delivered to the intended victim. The bug then delivers a convincing iCloud log-in box for users to re-enter their Apple ID and password. Soucek says that Apple did not respond to his discovery of the bug when he stumbled across it back in January.


"Back in January 2015 I stumbled upon a bug in iOS's mail client, resulting in HTML tag in e-mail messages not being ignored. This bug allows remote HTML content to be loaded, replacing the content of the original e-mail message. JavaScript is disabled in this UIWebView, but it is still possible to build a functional password "collector" using simple HTML and CSS."

The bug isn't relegated to only iCloud phishing attacks, however, letting anyone with access to it customize the attack to ask for whichever username and password credentials they feel the need for. Soucek kept the details of the bug only between himself and Apple, letting the company have time to possibly fix the attack and inform him of its progress. Given the company's remaining quietness on the subject, he decided to publish the proof of concept - called the Mail.app inject kit - on GitHub in hopes of spreading its awareness.

"It was filed under Radar #19479280 back in January, but the fix was not delivered in any of the iOS updates following 8.1.2. Therefore I decided to publish the proof of concept code here."

While Soucek's actions bring the malicious bug to more people's attentions and can help stop it in due time, it also means there's a wider chance for phishers to deploy it on their own. Until Apple comments on the story and offers a fix for the bug, it'll be safest to take precaution when any password prompt emerges while browsing email in iOS.

Related Forum: iOS 8

Top Rated Comments

laurim Avatar
148 months ago
I've been having issues with repeated requests to log into iCloud for a while so if this happened while I was in Mail, I wouldn't know if it were simply more of the same or a malicious one via Mail itself. You people on here being so smug talking smack about your wives being so dumb need to stop before you embarrass yourself. well, too late but I mean after you also fall for it. This is different than falling for a regular phishing email .
Score: 11 Votes (Like | Disagree)
nagromme Avatar
148 months ago
Will the fake dialog swipe/scroll when you scroll the email? If so, that's a quick check as a defensive stopgap for those who want to watch out for this. A real dialog would be stuck to the screen and not move when you scroll.
Score: 6 Votes (Like | Disagree)
tigres Avatar
148 months ago
Splendid... My wife would fall for that.
Score: 6 Votes (Like | Disagree)
avanpelt Avatar
148 months ago
Turn two factor authentication or app-specific passwords on (or both) and this will not be a problem. Though obviously it is something that Apple needs to fix.
Score: 5 Votes (Like | Disagree)
148 months ago
That's not something Apple can control without removing features from Mail that exist in literally every modern e-mail client. Essentially what is happening here is Mail is rendering a website. It's a very small website and it's been designed to look like Apple's UI to trick you.

So here are Apple's options:


* They could disable HTML / CSS completely, and push Mail back into the dark ages.
* They could offer a toggle to disable HTML / CSS in Mail, which few people would use and would cause unexpected issues when a valid e-mail requires HTML / CSS to render.
* They could disable specific HTML like FORMS, which would prevent this particular scam but again, cause unexpected issues when a valid e-mail has a valid form.
* They could scan the email for specific html like FORMS and provide a notice/alert that the email might be attempting to steal passwords. This is probably the best scenario but even so it would scare users away from legitimate emails using forms (which granted, are very few)

But again... this e-mail would look the same and FUNCTION the same whether you viewed it on iOS, or OS X, or Windows, or via Safari or Chrome or Opera... whether you loaded the email from Mail.app or via iCloud or Gmail or Outlook or any other email client.

And any "fix" Apple takes on its end is really only a bandage. It wouldn't prevent this phishing email from functioning on other e-mail clients and any "fix" they offer has downsides as listed above.

It's not an exploit. It's not a bug. It's not something that can only affect iOS users outside that it vaguely looks like the iOS environment. It's not a "Meta tag issue" or the result of some faulty programming on the part of Apple's iOS development team.
Perhaps if Apple's own prompts to ask for iCloud passwords here and there weren't as common or secured in some way to clearly be unique to an actual valid system prompt then things of this nature wouldn't have as much potential of being abused.
You haven't checked the link, have you? https://github.com/jansoucek/iOS-Mail.app-inject-kit
It is a meta tag issue, and your four bullets above wouldn't do anything to stop it. The email doesn't have a form, the email redirects the user to a webpage (within the mail client) that has a form. Big difference. And as the person has described, it doesn't work the same way in all mail clients, as others wouldn't follow the meta refresh.
Go read up, then come back and change your mind.
And then there's that.
Score: 4 Votes (Like | Disagree)
mw360 Avatar
148 months ago
Perhaps if Apple's own prompts to ask for iCloud passwords here and there weren't as common or secured in some way to clearly be unique to an actual valid system prompt then things of this nature wouldn't have as much potential of being abused.
I posted a good while ago about exactly this problem. Of my four iCloud enabled devices I must get at least one spurious iCloud password prompt per day (although some periods are worse than others). It seems to be either iMessage and its eternal struggle to get a ****ing grip, or FaceTime, or some other cluster that's gone off behind the scenes. And these prompts are rarely related to me actually trying to so something iCloud related. Just turn on the iPhone, and 'enter your iCloud password'. Apple don't even say why, just training us, like good little dupes, to hand it over whenever some plain white box asks for it.
Score: 3 Votes (Like | Disagree)

Popular Stories

M5 MacBook Pro

RIP, MacBook Ultra

Monday October 19, 2026 9:37 am PDT by
Apple today sent out invites for an experience in Los Angeles on Wednesday, October 28, and the "Pro and tell" tagline on the invitation likely means that the rumored MacBook models with touch-enabled OLED displays will stick with MacBook Pro branding instead of the once-rumored "MacBook Ultra" name. The long-rumored "iPhone Ultra" ended up being named iPhone Duo, so speculation that Apple...
iPhone Duo Trio

Here's What Apple's Apps Look Like on the iPhone Duo

Tuesday October 20, 2026 11:12 am PDT by
With just three days to go until the iPhone Duo is released, Apple is getting ready for the launch. Behind the scenes, the App Store now has screenshots of Apple's built-in apps running on the Duo. We've seen some apps in marketing materials, but images of the ones we haven't seen give us an idea of what it will be like using the iPhone Duo day to day. Many apps are shown in landscape...
apple pro tell logo

Apple Announcing New Products Next Week: 'Pro and Tell'

Monday October 19, 2026 9:05 am PDT by
Apple's Greg Joswiak today hinted at new product announcements coming next week, sharing a social media post that says "Can't wait to pro and tell next week." Rumors suggest Apple is planning to debut the new MacBook Pro with an OLED touchscreen display, an M6 entry-level MacBook Pro, an M6 iMac, an iPad mini with an OLED display. Can't wait to pro and tell next week....
Latest Stories
Tesla App Gains iPad and iPhone Duo Support
Tesla App Gains iPad and iPhone Duo Support
1 hour ago
Apple Reportedly Boosts iPhone Duo Orders by 44%
Apple Reportedly Boosts iPhone Duo Orders by 44%
1 hour ago
Fortnite Returning to Australian App Store After Court Ruling
Fortnite Returning to Australian App Store After Court Ruling
2 hours ago
Apple Ordered to Open iPhone to Rival App Stores in Australia
Apple Ordered to Open iPhone to Rival App Stores in Australia
2 hours ago
Apple Suppliers Face Hurdles Cutting Circuit Board Emissions
Apple Suppliers Face Hurdles Cutting Circuit Board Emissions
3 hours ago
Things Updated for iPhone Duo With Adaptive Layout
Things Updated for iPhone Duo With Adaptive Layout
3 hours ago
Simplicity and Siri AI Are HomeView's Killer Features, Apple Says
Simplicity and Siri AI Are HomeView's Killer Features, Apple Says
3 hours ago
iPhone Duo Reviewers Really Miss Face ID
iPhone Duo Reviewers Really Miss Face ID
8 hours ago
Does the iPhone Duo Run Hot? Here's What Reviews Found
Does the iPhone Duo Run Hot? Here's What Reviews Found
10 hours ago
Apple Music's New Look is Now Live on Apple's Website
Apple Music's New Look is Now Live on Apple's Website
10 hours ago
Anthropic Launches Claude Duet, a Proactive AI Agent
Anthropic Launches Claude Duet, a Proactive AI Agent
11 hours ago
What 32,000 Folds Did to the iPhone Duo's Hinge
What 32,000 Folds Did to the iPhone Duo's Hinge
12 hours ago
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
13 hours ago
iPhone Duo Has 'Edge Light' Feature That Debuted on Macs Last Year
iPhone Duo Has 'Edge Light' Feature That Debuted on Macs Last Year
14 hours ago
Apple Support App Updated for iPhone Duo's Larger Display
Apple Support App Updated for iPhone Duo's Larger Display
14 hours ago
Amazon Sweetens the Deal on Entry-Level 16-Inch MacBook Pro With $570 Off
Amazon Sweetens the Deal on Entry-Level 16-Inch MacBook Pro With $570 Off
14 hours ago
iPhone Duo Tips Over on MagSafe Stands When Unfolded
iPhone Duo Tips Over on MagSafe Stands When Unfolded
14 hours ago
Apple Music's New Look Officially Announced
Apple Music's New Look Officially Announced
16 hours ago
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
17 hours ago
iPhone Duo Accessories Roundup: Cases and Screen Protectors From OtterBox, ZAGG, and More
iPhone Duo Accessories Roundup: Cases and Screen Protectors From OtterBox, ZAGG, and More
17 hours ago
Apple Stores Will Have 'Limited' Availability of iPhone Duo for Walk-In Customers
Apple Stores Will Have 'Limited' Availability of iPhone Duo for Walk-In Customers
18 hours ago
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
18 hours ago
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
19 hours ago
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
23 hours ago
Apple Stores in Bordeaux and Lille Looted During French Protests
Apple Stores in Bordeaux and Lille Looted During French Protests
23 hours ago
Bluesound Adds Native Apple Music Support
Bluesound Adds Native Apple Music Support
1 day ago
Apple CEO John Ternus Explains What Makes Good Product Design
Apple CEO John Ternus Explains What Makes Good Product Design
1 day ago
UK Proposes New Ways to Help Apple Pay Rivals
UK Proposes New Ways to Help Apple Pay Rivals
1 day ago
WhatsApp Developing In-App Browser for All Chat Links on iPhone
WhatsApp Developing In-App Browser for All Chat Links on iPhone
1 day ago
Apple's App Store Chief Explains Its Push for Premium Games
Apple's App Store Chief Explains Its Push for Premium Games
1 day ago