Beautiful Virgin Islands

Sunday, Nov 23, 2025

Twitter fined $550k over a data breach in Ireland’s first major GDPR decision

Twitter fined $550k over a data breach in Ireland’s first major GDPR decision

Ireland's data regulator has fined Twitter 450,000 euros for a bug that made some private Tweets public - in the first sanction against a U.S. firm under a new European Union data privacy system
Ireland’s Data Protection Commission (DPC) has issued Twitter with a fine of €450,000 (~$547k) for failing to promptly declare and properly document a data breach under Europe’s General Data Protection Regulation (GDPR).

The decision is noteworthy as it’s the first such cross-border GDPR decision by the Irish watchdog, which is the lead EU privacy supervisor for a number of tech giants — having a backlog of some 20+ ongoing cases at this point, including active probes of Facebook, WhatsApp, Google, Apple and LinkedIn, to name a few.

“The DPC’s investigation commenced in January, 2019 following receipt of a breach notification from Twitter and the DPC has found that Twitter infringed Article 33(1) and 33(5) of the GDPR in terms of a failure to notify the breach on time to the DPC and a failure to adequately document the breach. The DPC has imposed an administrative fine of €450,000 on Twitter as an effective, proportionate and dissuasive measure,” the regulator writes in a press release.

The GDPR requires most breaches of personal data to be notified to the relevant supervisory authority within 72 hours of the controller becoming aware of the breach.

The regulation also requires they document what data was involved and how they’ve responded to the security incident — in order that the relevant data supervisor can check against compliance.

In this case Twitter was found to have failed on both counts.

We’ve reached out to the social media company for comment, including asking whether it plans to accept the decision and pay up — or if it’s considering its legal options.

Twitter has sent this statement, attributed to Damien Kieran, its chief privacy officer and global data protection officer:

“Twitter worked closely with the Irish Data Protection Commission (IDPC) to support their investigation. We have a shared commitment to online security and privacy, and we respect the IDPC’s decision, which relates to a failure in our incident response process. An unanticipated consequence of staffing between Christmas Day 2018 and New Years’ Day resulted in Twitter notifying the IDPC outside of the 72 hour statutory notice period. We have made changes so that all incidents following this have been reported to the DPC in a timely fashion.

We take responsibility for this mistake and remain fully committed to protecting the privacy and data of our customers, including through our work to quickly and transparently inform the public of issues that occur. We appreciate the clarity this decision brings for companies and consumers around the GDPR’s breach notification requirements. Our approach to these incidents will remain one of transparency and openness.”

The company also told us that since this specific incident, where inadequate staffing over the 2018 holiday period led to a delay in reporting the breach, it has made all relevant incident reports to the DPC within the required 72 hour period.

The DPC’s decision relates to a breach that Twitter publicly disclosed in January 2019 — when it said a bug in its ‘Protect your tweets’ feature could have meant some Android users who’d applied the setting to make their tweets non-public may have had their data exposed to the public Internet since as far back as 2014. (Though GPDR would only apply to data the bug exposed since May 2018.)

Since fessing up to the ‘Protect your tweets’ bug, Twitter has had plenty more egg on its face where security is concerned — including suffering a high profile account hijacking episode earlier this year, after crypto-scam-spreading hackers gained network access credentials using a social engineering technique.

Ireland’s DPC, meanwhile, continues to face criticism for the length of time it’s taking to reach decisions on major cross-border GDPR cases where impacts on individual rights can scale to hundreds of millions of European Internet users.

Last year commissioner Helen Dixon said its first major GDPR decisions would come “early” in 2020.

In the event the first cross-border decision has crossed the line days before the end of the year — underlining the challenges for the bloc in effectively enforcing its digital rulebook against tech giants. (GDPR technically begun being applied in May 2018, although platform giants have faced precious little enforcement to date.)

In this specific case, some half a year extra was added to the decision timeline after a draft outcome Ireland submitted to other EU DPAs for review, back in May, was not accepted by all of them — triggering a majority vote mechanism in the GDPR for settling disagreement between the bloc’s data supervisors.

The European Data Protection Board (EDPB) has published this Article 65 decision and the full final decision on its website here.

The (now) final outcome on the Twitter case comes at a key time — with EU lawmakers due to set out their next major pieces of digital policy later today, as part of an ambitious push to accelerate regional digitization by rolling out a reassuring promise of European guardrails wrapping around all this tech.

Yet with GDPR enforcement proving such a tedious, friction-filled process that threatens to take the shine off the nascent Digital Services Act and Digital Markets Act many months (or even years) before they can become EU law — raising questions about how the whole strategy can be expected to function in the absence of effective (i.e. fair but fast) enforcement.

The wider risk here is European citizens losing faith in the rights-based framework they’re told they enjoy, under EU law and the bloc’s patchwork of regulatory frameworks, if the animal turns out to be such a plodding house-cat when people do try to obtain relief.

So the Commission’s strategy of claiming expanded digital rules will act as a public trust booster risks falling into a trough of disillusionment at the legislative proposal stage.

Simple put: You can’t allow your regulators to move so slowly and expect your rulebook to touch tech giants whose playbook is to move fast in order to disrupt the rule of law in their own business’ interests.

The DPC’s decision in the Twitter case is thus a measure of how sizeable a gap sits between the rhetoric EU policymakers ply around the bloc’s ‘powerful’ digital rules — and the messier and more faltering reality: Nearly two years since Twitter disclosed the breach and waiting for a hammer to drop in what should be a relatively straightforward case.

A data breach is not an investigation into the lawfulness of Facebook’s business model vs GDPR, after all, nor does it delve into the intricacies of Google’s adtech — both of which are still open case files on the DPC’s desk.

The penalty itself is also a fraction (a little over 0.1%) of Twitter’s full-year 2019 revenue; a far cry from the up to 4% of global annual turnover maximum allowed for under the GDPR (or the up to 2% max for the specific infringements involved in the breach case).

The size of the fine calculated by Ireland was one of the objections raised by other EU DPAs during the dispute of the draft decision — the DPC initially proposed an even smaller fine (in the range of 0.005% and 0.01% of Twitter’s annual turnover; or between €135k and €275k).

The Article 65 intervention forced Ireland to increase the size of the penalty (though not by much), with the EDPB issuing a binding requirement that Ireland reassess the calculation “so as to ensure it is appropriate to the facts of the case”. (It did not specify how large an increase would be required.)

EU DPAs also disagreed on the controller/processor status of Twitter’s Irish business vs its US entity — with Ireland accepting Twitter Ireland as the data controller and Twitter Inc as the processor, a designation that seems intended to reduce its liability.

So this first cross-border GDPR decision looks more millstone than milestone for the Commission, at the fag end of 2020.

There’s not a lot for commissioners to celebrate here, even though they suggested in the summer that the best answer to GDPR enforcement concerns would be for Ireland to get a decision out. The problem now is the black marks against the bloc’s record on digital enforcement look stubbornly set in — just as the Commission is laying out a plan to go all in on platform regulation.

The questions over enforcement are going to keep coming.
Newsletter

Related Articles

Beautiful Virgin Islands
0:00
0:00
Close
Maduro Tightens Security Measures as U.S. Strike Threat Intensifies
U.S. Envoys Deliver Ultimatum to Ukraine: Sign Peace Deal by Thursday or Risk Losing American Support
Zelenskyy Signals Progress Toward Ending the War: ‘One of the Hardest Moments in History’ (end of his business model?)
U.S. Issues Alert Declaring Venezuelan Airspace a Hazard Due to Escalating Security Conditions
The U.S. State Department Announces That Mass Migration Constitutes an Existential Threat to Western Civilization and Undermines the Stability of Key American Allies
Students Challenge AI-Driven Teaching at University of Staffordshire
Pikeville Medical Center Partners with UK’s Golisano Children’s Network to Expand Pediatric Care
Germany, France and UK Confirm Full Support for Ukraine in US-Backed Security Plan
UK Low-Traffic Neighbourhoods Face Rising Backlash as Pandemic Schemes Unravel
UK Records Coldest Night of Autumn as Sub-Zero Conditions Sweep the Country
UK at Risk of Losing International Doctors as Workforce Exodus Grows, Regulator Warns
ASU Launches ASU London, Extending Its Innovation Brand to the UK Education Market
UK Prime Minister Keir Starmer to Visit China in January as Diplomatic Reset Accelerates
Google Launches Voluntary Buyouts for UK Staff Amid AI-Driven Company Realignment
UK braces for freezing snap as snow and ice warnings escalate
Majority of UK Novelists Fear AI Could Displace Their Work, Cambridge Study Finds
UK's Carrier Strike Group Achieves Full Operational Capability During NATO Drill in Mediterranean
Trump and Mamdani to Meet at the White House: “The Communist Asked”
Nvidia Again Beats Forecasts, Shares Jump in After-Hours Trading
Wintry Conditions Persist Along UK Coasts After Up to Seven Centimetres of Snow
UK Inflation Eases to 3.6 % in October, Opening Door for Rate Cut
UK Accelerates Munitions Factory Build-Out to Reinforce Warfighting Readiness
UK Consumer Optimism Plunges Ahead of November Budget
A Decade of Innovation Stagnation at Apple: The Cook Era Critique
Caribbean Reparations Commission Seeks ‘Mutually Beneficial’ Justice from UK
EU Insists UK Must Contribute Financially for Access to Electricity Market and Broader Ties
UK to Outlaw Live-Event Ticket Resales Above Face Value
President Donald Trump Hosts Saudi Crown Prince Mohammed bin Salman at White House to Seal Major Defence and Investment Deals
German Entertainment Icons Alice and Ellen Kessler Die Together at Age 89
UK Unveils Sweeping Asylum Reforms with 20-Year Settlement Wait and Conditional Status
UK Orders Twitter Hacker to Repay £4.1 Million Following 2020 High-Profile Breach
Popeyes UK Eyes Century Mark as Fried-Chicken Chain Accelerates Roll-out
Two-thirds of UK nurses report working while unwell amid staffing crisis
Britain to Reform Human-Rights Laws in Sweeping Asylum Policy Overhaul
Nearly Half of Job Losses Under Labour Government Affect UK Youth
UK Chancellor Reeves Eyes High-Value Home Levy in Budget to Raise Tens of Billions
UK Urges Poland to Choose Swedish Submarines in Multi-Billion € Defence Bid
US Border Czar Tom Homan Declares UK No Longer a ‘Friend’ Amid Intelligence Rift
UK Announces Reversal of Income Tax Hike Plans Ahead of Budget
Starmer Faces Mounting Turmoil as Leaked Briefings Ignite Leadership Plot Rumours
UK Commentator Sami Hamdi Returns Home After US Visa Revocation and Detention
UK Eyes Denmark-Style Asylum Rules in Major Migration Shift
UK Signals Intelligence Freeze Amid US Maritime Drug-Strike Campaign
TikTok Awards UK & Ireland 2025 Celebrates Top Creators Including Max Klymenko as Creator of the Year
UK Growth Nearly Stalls at 0.1% in Q3 as Cyberattack Halts Car Production
Apple Denied Permission to Appeal UK App Store Ruling, Faces Over £1bn Liability
UK Chooses Wylfa for First Small Modular Reactors, Drawing Sharp U.S. Objection
Starmer Faces Growing Labour Backlash as Briefing Sparks Authority Crisis
Reform UK Withdraws from BBC Documentary Amid Legal Storm Over Trump Speech Edit
UK Prime Minister Attempts to Reassert Authority Amid Internal Labour Leadership Drama
×