Vulnerability Intelligence Report
CVE-2023-27533
A vulnerability in input validation exists in curl <8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform option negotiation without the application's intent. This vulnerability could be exploited if an application allows user input, thereby enabling attackers to execute arbitrary code on the system.
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:1.99%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-75 ↗Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) (CWE-75)
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| haxx | curl | all |
| fedoraproject | fedora | 36 |
| netapp | active_iq_unified_manager | all |
| netapp | clustered_data_ontap | 9.0 |
| netapp | h300s_firmware | all |
| netapp | h300s | all |
| netapp | h500s_firmware | all |
| netapp | h500s | all |
| netapp | h700s_firmware | all |
| netapp | h700s | all |
| netapp | h410s_firmware | all |
| netapp | h410s | all |
| splunk | universal_forwarder | 9.1.0 |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
1.993%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | HackerOne · Bug Bounty Provider · USA |
| Reserved | 2023-03-02T00:00:00 |
| Published | 2023-03-30T00:00:00 |
| Last Updated | 2026-02-13T20:09:17 |
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