CVE-2003-1561

Opera, probably before 7.50, sends Referer headers containing https:// URLs in requests for http:// URLs, which allows remote attackers to obtain potentially sensitive information by reading Referer log data.

CVSS 4.3 · Medium

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2003-1561.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

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Exact CVE query

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Metadata

Canonical fields

NVD status

Unavailable

Published

Dec 31, 2003

Modified

Jun 16, 2026

Official record

Authoritative NVD record

CVSS vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

CWE IDs

Vendor classifications

How this vector reads

CVSS 2.0 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Access Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Access Complexity (AC): Medium. Exploitation requires some additional access conditions.
Authentication (Au): None. The attacker does not need to authenticate.
Confidentiality Impact (C): Partial. There is a limited impact to this security property.
Integrity Impact (I): None. There is no impact to this security property.
Availability Impact (A): None. There is no impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses