How severe is CVE-2009-2059?

CVE-2009-2059 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-2059 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2059?

CVE-2009-2059 primarily affects Opera Opera Browser. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2059?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-2059 published?

CVE-2009-2059 was published on 2009-06-15 and last updated on 2026-06-16.

CVE-2009-2059

CVE-2009-2059 is a medium-severity vulnerability in Opera Opera Browser with a CVSS 2.0 base score of 6.8. 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Opera Opera Browser
Published: 2009-06-15
Last modified: 2026-06-16

Description

Opera, possibly before 9.25, uses the HTTP Host header to determine the context of a document provided in a (1) 4xx or (2) 5xx CONNECT response from a proxy server, which allows man-in-the-middle attackers to execute arbitrary web script by modifying this CONNECT response, aka an "SSL tampering" attack.

Frequently asked questions

What is CVE-2009-2059?: Opera, possibly before 9.25, uses the HTTP Host header to determine the context of a document provided in a (1) 4xx or (2) 5xx CONNECT response from a proxy server, which allows man-in-the-middle attackers to execute arbitrary web script by modifying this CONNECT response, aka an "SSL tampering" attack.
How severe is CVE-2009-2059?: CVE-2009-2059 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-2059 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2059?: CVE-2009-2059 primarily affects Opera Opera Browser. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-2059?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2059 published?: CVE-2009-2059 was published on 2009-06-15 and last updated on 2026-06-16.

References

Affected products (21)

cpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:7.0:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:7.23:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:7.53:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:7.54:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:7.60:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.0:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.01:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.02:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.50:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.51:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.52:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.53:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:8.54:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.0:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.01:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.02:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.10:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.12:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.20:*:*:*:*:*:*:*
cpe:2.3:a:opera:opera_browser:9.21:*:*:*:*:*:*:*

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