XenForo < 2.3.13 Signature Verification Bypass via PayPal REST Webhook
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| XenForo | XenForo | unaffected |
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Xenforo | Xenforo |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.651% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:* |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Xenforo
Xenforo xenforo |
|
| Vendors & Products |
Xenforo
Xenforo xenforo |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | XenForo before 2.3.13 contains a signature verification logic error in the PayPal REST webhook handler that allows unauthenticated attackers to bypass payment signature validation by submitting a webhook request with an unsupported auth_algo header value. When the algorithm cannot be mapped to a supported hash function, the verification function incorrectly returns true instead of failing, causing the caller to treat the fabricated request as verified and process the payment event without a valid PayPal signature. | |
| Title | XenForo < 2.3.13 Signature Verification Bypass via PayPal REST Webhook | |
| Weaknesses | CWE-754 | |
| References |
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|
| Metrics |
cvssV3_1
|