CVE-2003-0987

Status: ModifiedHigh (7.5)—
mod_digest for Apache before 1.3.31 does not properly verify the nonce of a client response by using a AuthNonce secret.
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 5.56%
Percentile among all scored CVEs: 93
Score date: 10/7/2026
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).
Affected technologies (1)

Apache — Http Server
CWEs

NVD-CWE-Other
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2003-0987",
  "cveTags": [],
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      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": true,
        "userInteractionRequired": false
      }
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      "affectedData": [
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          "product": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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  "published": "2004-03-03T05:00:00.000",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
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  "descriptions": [
    {
      "lang": "en",
      "value": "mod_digest for Apache before 1.3.31 does not properly verify the nonce of a client response by using a AuthNonce secret."
    },
    {
      "lang": "es",
      "value": "mod_digest de Apache no verifica adecuadamente el nonce de una respuesta de cliente usando un secreto AuthNonce."
    }
  ],
  "lastModified": "2026-06-16T22:03:18.120",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
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              "versionEndIncluding": "1.3.30"
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          "operator": "OR"
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  "vendorComments": [
    {
      "comment": "Fixed in Apache HTTP Server 1.3.31:\nhttp://httpd.apache.org/security/vulnerabilities_13.html",
      "lastModified": "2008-07-02T00:00:00",
      "organization": "Apache"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}