EspoCRM has authenticated SSRF via internal-host validation bypass using alternative IPv4 notation
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| espocrm | espocrm | affected |
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Espocrm | Espocrm |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: 2.0% (1.978% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:espocrm:espocrm:*:*:*:*:*:*:*:* |
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|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Espocrm
Espocrm espocrm |
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| Vendors & Products |
Espocrm
Espocrm espocrm |
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| Description | EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below have an authenticated Server-Side Request Forgery (SSRF) vulnerability that allows bypassing the internal-host validation logic by using alternative IPv4 representations such as octal notation (e.g., 0177.0.0.1 instead of 127.0.0.1). This is caused by HostCheck::isNotInternalHost() function relying on PHP's filter_var(..., FILTER_VALIDATE_IP), which does not recognize alternative IP formats, causing the validation to fall through to a DNS lookup that returns no records and incorrectly treats the host as safe, however the cURL subsequently normalizes the address and connects to the loopback destination. Through the confirmed /api/v1/Attachment/fromImageUrl endpoint, an authenticated user can force the server to make requests to loopback-only services and store the fetched response as an attachment. This vulnerability is distinct from CVE-2023-46736 (which involved redirect-based SSRF) and may allow access to internal resources reachable from the application runtime. This issue has been fixed in version 9.3.4. | |
| Title | EspoCRM has authenticated SSRF via internal-host validation bypass using alternative IPv4 notation | |
| Weaknesses | CWE-918 | |
| References |
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| Metrics |
cvssV3_1
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