EUVD-2026-61159
GHSA-9fxw-r4jg-3hq3
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable with no authentication or prerequisites; availability impact limited to CPU exhaustion from unbounded bcrypt calls; missing rate limit itself causes no direct confidentiality or integrity impact.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionCVE.org
Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate limiting vulnerability that allows unauthenticated attackers to send unbounded login requests to the POST /v1/sessions endpoint due to dead code in App\Http\Kernel.php that is never instantiated under the Laravel 11+ skeleton, leaving the API throttle configuration unattached to any route. Attackers can exploit this by sending unlimited credential attempts with no lockout or CAPTCHA enforcement, and additionally trigger CPU exhaustion by forcing repeated bcrypt comparisons on each request.
AnalysisAI
Missing rate limiting on the POST /v1/sessions login endpoint in Plainpad through 1.1.1 allows unauthenticated remote attackers to submit unlimited credential attempts with no lockout, enabling both credential stuffing and a CPU exhaustion denial-of-service via repeated bcrypt comparisons. The flaw originates from a Laravel framework version mismatch: the throttle middleware was defined in App\Http\Kernel.php, which is dead code never instantiated by the Laravel 11+ bootstrap model, leaving the API route group entirely unthrottled. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required - POST /v1/sessions is a publicly accessible endpoint by design, intended to accept unauthenticated login attempts. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms fully remote, unauthenticated exploitation with no special conditions and no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a list of email addresses and a credential dump from a prior breach submits automated POST requests to /v1/sessions in a credential stuffing loop; with no rate limit or lockout enforced, tens of thousands of attempts per minute are feasible using standard tooling such as ffuf or hydra. Simultaneously, the bcrypt comparison triggered on each attempt drives sustained CPU utilization on the server, potentially degrading or denying service to legitimate users. … |
| Remediation | Upstream fix available via commit d3823fc595b5d8f842a6fd7dfe49b7852a10fdac (https://github.com/alextselegidis/plainpad/commit/d3823fc595b5d8f842a6fd7dfe49b7852a10fdac); a released patched version number has not been independently confirmed from available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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