Skip to content
Back to Blog
high severity July 06, 2023 · 3 min read Unverified claim — what this is

WOLTERSKLUWER.COM Listed by clop Ransomware Group

If you are a customer of Wolterskluwer.Com, here’s what is being claimed, and what it would mean for you.

Wolters Kluwer - Combining Domain Expertise With Advanced Technology - Wolters Kluwer

— from Clop’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.
WOLTERSKLUWER.COM Listed by clop Ransomware Group

On July 6, 2023, the ransomware group known as Clop added wolterskluwer.com to its public leak site, claiming that internal files had been exfiltrated from the global professional information services company during a ransomware attack. Anyone whose personal or employment data resides in Wolters Kluwer systems may now be exposed, even though the exact number of affected individuals remains unknown.

Already exposed?
You can’t unleak data. You can take away what it’s worth.
A leaked record is where it starts, not where it ends. What turns it into your front door is the look-up sites publishing your address beside your name — and those are what an AI reads when somebody asks about you. The free scan shows you both. We write to 582 companies.
See what is exposed about you — free scan →
Not ready yet? Run a free breach check on this email
We’ll check it against 13.1B+ leaked records right now — no account needed. Continuous monitoring & alerts are part of Protection.

Primary Disclosure Details

The Clop leak site listing states that internal files were exfiltrated from Wolters Kluwer. It does not quantify the volume of data, list specific record counts, or itemize the types of documents taken. The disclosure simply confirms successful data theft following a ransomware deployment and gives the company a limited window to negotiate before files are published or sold. Public mirrors of the leak site, such as ransomware.live, preserve the original posting timestamp of July 6, 2023, and the exact onion address used by the group.

Why This Matters for You and Your Family

When a company the size of Wolters Kluwer loses control of internal files, the information inside often includes employee records, customer contracts, tax documents, or partner details that contain names, addresses, dates of birth, Social Security numbers, and financial account data. If your employer, bank, insurer, or healthcare provider uses Wolters Kluwer software or services, your information could be among the stolen material. The breach therefore creates direct identity-theft and fraud risk for ordinary people and their families, not just corporate executives.

July 6, 2023 marks the moment the incident moved from private negotiation to public shaming. Once data appears on a ransomware leak site, it spreads quickly through underground forums and can remain available for years.

Doxxing and Identity-Chain Implications

Stolen internal files rarely contain only one data point. A single spreadsheet can link an email address to a home address, phone number, date of birth, and employer. Attackers and identity thieves then combine these fragments with data from previous breaches to build complete profiles. The result is an identity chain that lets criminals impersonate you, open accounts in your name, or target your family members. Credential leaks that surface in the same datasets can also compromise logins used for online banking, email, or gaming accounts belonging to you or your children.

Clop’s Publicly Known Track Record

Public reporting attributes the first major activity by Clop (sometimes stylized CLOP or Cl0p) to late 2019. The group rose to prominence in 2021–2023 after compromising large file-transfer platforms such as Accellion FTA and GoAnywhere. Notable prior victims include financial services firms, healthcare systems, and other enterprise software providers. Clop’s typical playbook begins with exploitation of vulnerable internet-facing appliances or stolen credentials, followed by lateral movement, data exfiltration, and deployment of their ransomware payload only after sensitive files have been copied. The group then demands multimillion-dollar ransoms and, if unpaid, publishes samples or full datasets on their Tor leak site to pressure victims and invite secondary buyers.

What to do

  • Run a DoxxScan to map every link between your handles, emails, phone numbers, and real identity so you can see exactly what chains back to the Wolters Kluwer exposure.
  • Rotate any password you used at wolterskluwer.com or related services anywhere it has been reused, and switch on 2FA through an authenticator app rather than SMS.
  • Enable continuous DoxxScan monitoring across 13.1B+ breach records and 100+ platforms so the next time your information surfaces you learn within hours instead of months.
  • Cover the household with DoxxScan family protection that extends to dependents and children’s gaming accounts, which often become gateways for further doxxing when credentials leak.
  • Let remediation specialists handle data-broker takedown requests and opt-out processes that would otherwise consume months of your own time.

The Wolters Kluwer listing is a reminder that even established global companies can lose control of the personal information entrusted to them. A short period of decisive action now can break the identity chains attackers hope to exploit. Start your DoxxScan trial and let its continuous monitoring, AI-powered identity-chain mapping, hands-on remediation specialists, and household coverage—including children’s gaming accounts—work on your behalf.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo
value redacted in this samplephone, household, property recordsBeenVerified
value redacted in this sample582 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach
unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Check your exposure
Wolterskluwer.Com is one listing. Your email is probably in others.
We can’t confirm any single incident against the sources we search, so we won’t pretend to. What we can show you is your own exposure — your email against 13.1B+ leaked records and the sites that publish your address. About 15 seconds. No account, no card.

By running your scan you agree to the Terms and Conditions and the Privacy Policy, and to GalaxyWarden emailing you the results of this scan.

Report details & sourcing

Severity High
Disclosed July 06, 2023
Last reviewed August 8, 2026
Affected Unconfirmed
Unverified claim — what this report is
This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.
Editorial & sourcing policy
GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.
Share this Post on X Reddit Email