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CVE-2019-10758· NVD / CVE Program· CNA snyk

mongo-express before 0.54.0 is vulnerable to Remote Code Execution via endpoints that uses the `toBSON` method.

Noroxi assessment

Priority: Now (action score 94/100)

  • CISA has confirmed exploitation in the wild (Dec 10, 2021). Remediation deadline for US federal agencies: Jun 10, 2022.
  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 84.7% (FIRST EPSS); higher than 99.7% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: mongo-express (npm) 0.54.0.

Patch today or shut off access. Upgrade to mongo-express (npm) 0.54.0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

mongo-express before 0.54.0 is vulnerable to Remote Code Execution via endpoints that uses the `toBSON` method. A misuse of the `vm` dependency to perform `exec` commands in a non-safe environment.

CriticalCVSS 9.9 · v3.1KEVWeaponized Fix available
Published
Dec 24, 2019
Updated
Jun 16, 2026
EPSS
84.7% · 99th percentile

Report tools

JSON

Action score

94

Now

Patch today or shut off access.

CVSS
39 / 40 · 9.9 / 10
CISA KEV
30 / 30 · Listed
EPSS
25 / 30 · 84.7%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Dec 10, 2021. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jun 10, 2022.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mongo-express projectmongo-express

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • mongo-express project mongo-expressbefore 0.54.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (snyk). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a mongo-express

    • All versions prior to version 0.54.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
npmmongo-expressbefore 0.54.00.54.0

Same product

mongo-express project: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-24391mongo-express before 1.0.0 offers support for certain advanced syntax but implements this in an unsafe way.
    61This week
  • CVE-2021-23372Denial of Service (DoS)
    30Monitor
  • CVE-2023-52555In mongo-express 1.0.2, /admin allows CSRF, as demonstrated by deletion of a Collection.
    24Monitor

Published before and after this one in the same product

  • Later →CVE-2021-21422Jun 21, 2021 · XSS Vulnerability in mongo-express
    24Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
npm:mongo-express0.54.0Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2019-10758 —
Proof-of-concept repository on GitHubstars:1122019-12-26
Proof-of-concept repository on GitHubstars:52020-01-05
Proof-of-concept repository on GitHubstars:02026-10-08

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+1 d
  3. CISA KEV+716 d
  4. TodayOct 22, 2026+2494 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records