CVE-2003-1561: Opera, probably before 7.50, sends Referer headers containing https:// URLs in requests for http:// URLs, whic

Routine

MEDIUM 4.3MITIGATE

CVE-2003-1561 is a medium-severity flaw (CVSS 4.3) affecting opera. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-200
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: opera

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:04 UTCUpdated Record last modified

opera opera MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy opera || rpm -q opera || opera --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2003-1561?

opera: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2003-1561 being exploited?

CVE-2003-1561 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2003-1561 affect?

CVE-2003-1561 affects opera. Severity is medium (CVSS 4.3). 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 urgent is CVE-2003-1561?

Priority 31/100. No elevated risk signals yet.

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References

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