Potential brute force vulnerability due to non-expiring SMS OTPs

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  "cveMetadata": {
    "cveId": "CVE-2024-8122",
    "assignerOrgId": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
    "assignerShortName": "WSO2",
    "dateUpdated": "2026-10-08T17:13:45.357Z",
    "dateReserved": "2024-08-23T14:52:53.493Z",
    "datePublished": "2026-10-08T00:09:52.353Z",
    "state": "PUBLISHED"
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      "title": "Potential brute force vulnerability due to non-expiring SMS OTPs",
      "descriptions": [
        {
          "lang": "en",
          "value": "The WSO2 Identity Server fails to enforce a default expiry time for SMS One-Time Passwords (OTPs) used in multi-factor authentication (MFA). This allows unused OTPs to remain valid indefinitely, presenting an opportunity for malicious actors to conduct brute force attacks by repeatedly guessing the OTP.\n\nThe absence of automatic expiration for OTPs grants attackers an unlimited timeframe to attempt guessing the correct code. A successful brute force attack can lead to an MFA bypass, resulting in the unauthorized takeover of a user's account and compromising the security and privacy of both the individual and the system.",
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              "value": "The WSO2 Identity Server fails to enforce a default expiry time for SMS One-Time Passwords (OTPs) used in multi-factor authentication (MFA). This allows unused OTPs to remain valid indefinitely, presenting an opportunity for malicious actors to conduct brute force attacks by repeatedly guessing the OTP.\n\nThe absence of automatic expiration for OTPs grants attackers an unlimited timeframe to attempt guessing the correct code. A successful brute force attack can lead to an MFA bypass, resulting in the unauthorized takeover of a user's account and compromising the security and privacy of both the individual and the system."
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      "affected": [
        {
          "vendor": "WSO2",
          "product": "WSO2 Identity Server",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "unknown",
              "versionType": "custom",
              "lessThan": "5.11.0"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-613: Insufficient Session Expiration",
              "cweId": "CWE-613",
              "type": "CWE"
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          ]
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      "references": [
        {
          "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3149/",
          "tags": [
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      "impacts": [
        {
          "capecId": "CAPEC-233",
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              "lang": "en",
              "value": "CAPEC-233 CAPEC-233: Brute Force"
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            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM"
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      "solutions": [
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          "lang": "en",
          "value": "Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3149/#solution",
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