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Threats / MongoDB / CVE-2019-10758
CVE-2019-10758 · EUVD no mirror located · GCVE no mirror located Verified 2026-06-22

MongoDB mongo-express vulnerability

mongo-express before 0.54.0 allows remote code execution through endpoints using the toBSON method, enabling unauthenticated attackers to execute arbitrary code on affected systems.

Verdict

Today item — known-exploited.

An attacker can exploit deserialization flaws in mongo-express request handling to achieve remote code execution. The vulnerability is actively exploited in the wild and poses critical risk to exposed MongoDB management interfaces.

CISA KEV Yes · 2021-12-103EPSS 0.84845 (verify live)4Exploit Weaponized · public PoC5
01

Is it exploitable?

— the evidence, ranked above the score
Exploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
575 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-12-10).
CISA KEV ↗Confirmed
Probability (EPSS)
EPSS 0.84845 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: MongoDB, mongo-express. Confirm exact fixed builds in the vendor advisory.
NVD ↗Reported
02

Who’s exploiting it?

— attribution turns risk into urgency
Attribution not established

No confirmed (advisory-backed) threat-actor attribution is established 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 identify an exposed mongo-express instance and craft a malicious request targeting a toBSON endpoint.
Business
An attacker gains code execution on the database administration server, potentially compromising all MongoDB data and infrastructure.
2

Keys to the kingdom — privilege/identity takeover narrative 2

Attacker
I execute arbitrary commands with the privileges of the mongo-express process to establish persistence or pivot to other systems.
Business
The organization loses control of its database layer, risking data theft, corruption, or destruction across dependent applications.
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)
  • EPSS probability (FIRST)
  • Weaponized exploit available (VulnCheck)
  • 575 reported-exploitation source(s)
  • Public exploit availability
  • Catalogued by snyk (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 snykCNA
    Credited with finding itNo finder named in the public CVE record — the work behind this find is unattributed.