teachenglish.vus.edu.vn

The Cyber Exposure Score is a published 0–100 formula built only from publicly observable signals. How this is calculated.

Trend: Credential risk down 65 since 2026-10-08 (30 days).

Posture summary

Software versions inside a published affected range (1, 1 known-exploited)

The public response carried a version for these products, and NVD publishes an affected range that contains it. This is not proof the software is unpatched — a distribution backport keeps the original version string while carrying the fix, so a fully patched build can appear here. Both halves of the comparison are public and checkable.

Public attack surface (104 hostnames in Certificate Transparency)

Hostnames this organization published in public TLS certificates. Passive OSINT — nothing was scanned; a wildcard certificate is in use, so the real footprint may be larger.

From the names alone: 5 remote access or sign-in, 1 admin tools, 8 non-production.

The hostname inventory — which forgotten hosts exist and where — is part of the complete audit for this domain.

Lookalike domains (17 registered of 65 checked, 1 serving no website)

Registered permutations of this domain. Existence is a fact, not an accusation — ownership and intent are not assessed. Those able to receive mail are the ones usable for invoice fraud and phishing. The Risk score (0–100) is a published formula weighing mail capability, registration age, spelling, what the homepage shows and phishing-feed hits, reduced when a name looks brand-owned (same registrar/nameservers, a redirect to this domain) or merely parked. How this is calculated.

14 further registered lookalike(s), 10 of them able to receive mail. The full list, with mail capability for each, is part of the complete audit.

Recommendations

• highEnforce DMARC

  No enforcing DMARC policy was observed. Publish a DMARC record and move to p=quarantine then p=reject to reduce spoofing.

• mediumEnable DNSSEC

  DNSSEC signing was not detected for this domain.

• criticalPatch known-exploited vulnerabilities

  1 known-exploited vulnerability(ies) may affect exposed services. Prioritize patching.

• criticalPatch what already has a public exploit

  1 vulnerability(ies) reported on this host have working exploit code published (Exploit-DB, Metasploit, Nuclei or a public PoC). Exploitation needs no development effort — patch these first.

• criticalConfirm software versions that fall inside a published affected range

  The public response carried a version for 8 detected product(s), and 1 published CVE range contains what we read. WordPress 5.8.2 falls inside the range published as affected by CVE-2026-87902 (>= 5.8 and < 5.8.17). 1 is on CISA's known-exploited list, meaning exploitation has been observed in the wild. This is an observation about a version string, not proof the software is unpatched: a distribution backport keeps the original version while carrying the fix. Check the build you are actually running, and patch or upgrade whatever is genuinely inside the range.

• criticalReset credentials seen in infostealer logs

  Public infostealer telemetry associates 58 employee credential set(s) with this domain — passwords captured from infected devices, which bypass password policy and often session-hijack past MFA. The most recent dates from 2026-10-20. Most commonly RedLine. Force a reset for the affected services, invalidate active sessions, and check the devices themselves.

• mediumReview third-party credential exposure

  2726 credential set(s) for third-party services used by this domain appear in the same telemetry. Supplier and SaaS accounts are a common lateral path.

• mediumStrengthen password requirements

  93% of the exposed employee passwords analysed rate as weak or very weak. Raise minimum length and screen new passwords against breach lists.

• highMonitor lookalike domains

  10 registered lookalike domain(s) can receive mail, which is what makes them usable for invoice fraud and credential phishing. 1 further lookalike(s) are registered but serve no website yet. Monitor them and consider defensive registrations.

• mediumReview the public subdomain footprint

  104 hostnames for this domain appear in public Certificate Transparency logs. Retire forgotten hosts — stale subdomains are a common entry point and a takeover risk.