CVE-2003-1561

CVE-2003-1561 is a medium-severity vulnerability in Opera with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2003-1561?
CVE-2003-1561 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2003-1561 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1561?
CVE-2003-1561 affects Opera. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2003-1561?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-1561 published?
CVE-2003-1561 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (1)

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