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Threats / WebPros / CVE-2026-41940
CVE-2026-41940 · EUVD no mirror located · GCVE no mirror located Verified 2026-06-06

WebPros cPanel & WHM and WP2 (WordPress Squared) vulnerability

WebPros cPanel & WHM and WP2 contain an authentication bypass vulnerability allowing unauthenticated remote attackers to gain unauthorized access to hosting control panels.

Verdict

Today item, not a backlog item.

An authentication bypass in the login flow enables attackers to circumvent credential requirements and access administrative interfaces without valid credentials, facilitating unauthorized system compromise and data theft.

CISA KEV Yes · 2026-04-303Ransomware use Flagged3EPSS 0.90762 (verify live)4
01

Is it exploitable?

— the evidence, ranked above the score
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-30), flagged for known ransomware use.
CISA KEV ↗Confirmed
Probability (EPSS)
EPSS 0.90762 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
FIRST EPSS ↗High
Severity / affected
Affected: WebPros, cPanel & WHM and WP2 (WordPress Squared). Confirm exact fixed builds in the vendor advisory.
NVD ↗Reported
Weakness (CWE)
Mapped to CWE-306 Missing Authentication — weakness family: Authentication.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
NVD ↗Reported
WeaknessCWE-306 · Missing AuthenticationAuthentication
02

Who’s exploiting it?

— attribution turns risk into urgency
Attribution not established

No threat-actor attribution is established from the public feed for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.

03

Why it matters

— the attack path, told twice: adversary, then board
1

Front door — unauthenticated access narrative 1

Attacker
I craft a request that bypasses the authentication mechanism in the login flow to access the control panel without valid credentials.
Business
Attackers gain unauthorized administrative access to hosting infrastructure, enabling lateral movement and persistence across customer environments.
2

Keys to the kingdom — privilege/identity takeover narrative 2

Attacker
I enumerate hosted websites and databases accessible through the compromised control panel to identify high-value targets.
Business
Customer data, websites, and hosted applications become exposed to theft, modification, or destruction at scale.
3

Lateral reach — past segmentation narrative 3

Attacker
I deploy ransomware payloads across multiple customer accounts and infrastructure to encrypt critical data and demand payment.
Business
Widespread service disruption, financial extortion losses, regulatory fines, and reputational damage from mass customer compromise.
04

What to do

— defensible action
  • Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05

Coverage & confidence

— what we know, and what we don’t

Established (cited)

  • KEV listing (CISA)
  • Ransomware-use flag (CISA)
  • EPSS probability (FIRST)
  • CWE weakness mapping (NVD)
  • Catalogued by VulnCheck (CNA)

    • Coverage gaps — stated, not hidden

  • No EUVD / GCVE mirror in feed — single-authority dependency for the identifier.
  • EPSS & exposure are time-varying; verify live at the source.
  • Threat-actor attribution not established from feed data — absence of a name is not absence of compromise.
  • No finder/reporter credit recorded in the public CVE entry — the work behind this find is unattributed.
    • Disclosure & credit2
    Catalogued by VulnCheckCNA
    Credited with finding itNo finder named in the public CVE record — the work behind this find is unattributed.