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CVE-2018-1002202

Status: ModifiedMedium (6.5)—PoC
Severity6.5Medium · CVSS 3.0
Exploitation probability13 %higher than 96% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableProof of concept on GitHub (unverified)

zip4j before 1.3.3 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.

CVSS

Base score
6.5
Version
3.0
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
13 %
Percentile among all scored CVEs
96
Score date
10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Zip4j Project — Zip4j

CWEs

References

Show 8 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-1002202",
  "cveTags": [],
  "metrics": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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    "cvssMetricV30": [
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        "type": "Primary",
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        "cvssData": {
          "scope": "UNCHANGED",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
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          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  },
  "affected": [
    {
      "source": "report@snyk.io",
      "affectedData": [
        {
          "vendor": "zip4j",
          "product": "zip4j",
          "versions": [
            {
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              "version": "unspecified",
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              "versionType": "custom"
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  ],
  "published": "2018-07-25T17:29:00.797",
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      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
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      "source": "report@snyk.io",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
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      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "zip4j before 1.3.3 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'."
    },
    {
      "lang": "es",
      "value": "zip4j en versiones anteriores a la 1.3.3 es vulnerable a un salto de directorio, lo que permite que los atacantes escriban en archivos arbitrarios mediante un ../ (punto punto barra) en una entrada de archivo Zip que se gestiona de manera incorrecta durante la extracción. Esta vulnerabilidad también se conoce como \"Zip-Slip\"."
    }
  ],
  "lastModified": "2026-06-17T01:33:21.310",
  "configurations": [
    {
      "nodes": [
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              "versionEndExcluding": "1.3.3"
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}