mal-2026-16220
Vulnerability from ossf_malicious_packages
Versions 1.0.1 through 1.1.4 of jexkcode automatically follow a hard-coded WhatsApp newsletter whenever a WhatsApp connection opens. The package waits three seconds and calls newsletterFollow without obtaining user consent or exposing a configuration option. The README advertises newsletter support but does not disclose this automatic account modification. Versions through 1.1.1 used a malformed newsletter JID; version 1.1.2 corrected it. Subsequent commits removed both failure and success logs, so version 1.1.4 performs the automatic follow without visible output. This behavior is unrelated to the package's stated functionality and modifies the user's WhatsApp account without authorization.
- CWE-506 - The product contains code that appears to be malicious in nature.
{
"affected": [
{
"database_specific": {
"cwes": [
{
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature.",
"name": "Embedded Malicious Code"
}
]
},
"package": {
"ecosystem": "npm",
"name": "jexkcode"
},
"versions": [
"1.0.1",
"1.1.0",
"1.1.1",
"1.1.2",
"1.1.3",
"1.1.4"
]
}
],
"credits": [
{
"contact": [
"mailto:smilinghyena4@gmail.com"
],
"name": "smiling-hyena",
"type": "FINDER"
}
],
"details": "Versions 1.0.1 through 1.1.4 of jexkcode automatically follow a hard-coded WhatsApp newsletter whenever a WhatsApp connection opens. The package waits three seconds and calls newsletterFollow without obtaining user consent or exposing a configuration option. The README advertises newsletter support but does not disclose this automatic account modification. Versions through 1.1.1 used a malformed newsletter JID; version 1.1.2 corrected it. Subsequent commits removed both failure and success logs, so version 1.1.4 performs the automatic follow without visible output. This behavior is unrelated to the package\u0027s stated functionality and modifies the user\u0027s WhatsApp account without authorization.",
"id": "MAL-2026-16220",
"modified": "2026-09-16T00:00:00Z",
"published": "2026-09-16T00:00:00Z",
"references": [
{
"type": "PACKAGE",
"url": "https://www.npmjs.com/package/jexkcode"
},
{
"type": "WEB",
"url": "https://github.com/jexkpinkman/JexkCode-baileys/commit/d614aeffe4c386d09c29e39c7d9581dfca8c889a"
},
{
"type": "WEB",
"url": "https://github.com/jexkpinkman/JexkCode-baileys/commit/8d412bfd2df5c0f2025fd89d12a5b1bfad186eca"
},
{
"type": "WEB",
"url": "https://github.com/jexkpinkman/JexkCode-baileys/commit/5cfbd91ad0caabcdf5e790b1e5de7afa730b56bf"
}
],
"schema_version": "1.7.4",
"summary": "Malicious code in jexkcode (npm)"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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