CVE-2026-41902 (GCVE-0-2026-41902)
Vulnerability from cvelistv5 – Published: 2026-05-07 18:03 – Updated: 2026-05-07 18:03
VLAI?
Title
FreeScout's user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks
Summary
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.217, the /user-setup/{hash} endpoint accepts a 60-character random invite_hash to set a new user's password. The endpoint performs no expiration check — the hash remains valid indefinitely until consumed. Combined with realistic hash-leakage scenarios (forwarded invite emails, HTTP referrer to external CDNs on the setup page, server-side log exposure, abandoned invite emails in shared inboxes), this enables unauthenticated permanent account takeover months or years after invite issuance. If the leaked invite was sent to an admin, the takeover yields admin access. This issue has been patched in version 1.8.217.
Severity ?
9.1 (Critical)
CWE
- CWE-613 - Insufficient Session Expiration
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| freescout-help-desk | freescout |
Affected:
< 1.8.217
|
{
"containers": {
"cna": {
"affected": [
{
"product": "freescout",
"vendor": "freescout-help-desk",
"versions": [
{
"status": "affected",
"version": "\u003c 1.8.217"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to version 1.8.217, the /user-setup/{hash} endpoint accepts a 60-character random invite_hash to set a new user\u0027s password. The endpoint performs no expiration check \u2014 the hash remains valid indefinitely until consumed. Combined with realistic hash-leakage scenarios (forwarded invite emails, HTTP referrer to external CDNs on the setup page, server-side log exposure, abandoned invite emails in shared inboxes), this enables unauthenticated permanent account takeover months or years after invite issuance. If the leaked invite was sent to an admin, the takeover yields admin access. This issue has been patched in version 1.8.217."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-613",
"description": "CWE-613: Insufficient Session Expiration",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-07T18:03:50.599Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-hqff-cwx7-3jpm",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-hqff-cwx7-3jpm"
},
{
"name": "https://github.com/freescout-help-desk/freescout/releases/tag/1.8.217",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/freescout-help-desk/freescout/releases/tag/1.8.217"
}
],
"source": {
"advisory": "GHSA-hqff-cwx7-3jpm",
"discovery": "UNKNOWN"
},
"title": "FreeScout\u0027s user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-41902",
"datePublished": "2026-05-07T18:03:50.599Z",
"dateReserved": "2026-04-22T15:11:54.672Z",
"dateUpdated": "2026-05-07T18:03:50.599Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-41902",
"date": "2026-05-08",
"epss": "0.0003",
"percentile": "0.08667"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-41902\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-05-07T19:16:00.807\",\"lastModified\":\"2026-05-07T19:51:36.220\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to version 1.8.217, the /user-setup/{hash} endpoint accepts a 60-character random invite_hash to set a new user\u0027s password. The endpoint performs no expiration check \u2014 the hash remains valid indefinitely until consumed. Combined with realistic hash-leakage scenarios (forwarded invite emails, HTTP referrer to external CDNs on the setup page, server-side log exposure, abandoned invite emails in shared inboxes), this enables unauthenticated permanent account takeover months or years after invite issuance. If the leaked invite was sent to an admin, the takeover yields admin access. This issue has been patched in version 1.8.217.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-613\"}]}],\"references\":[{\"url\":\"https://github.com/freescout-help-desk/freescout/releases/tag/1.8.217\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-hqff-cwx7-3jpm\",\"source\":\"security-advisories@github.com\"}]}}"
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- 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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- 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.
Loading…
Loading…