How severe is CVE-2015-2855?

CVE-2015-2855 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-2855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2855?

CVE-2015-2855 primarily affects Blue Coat Ssl Visibility Appliance Sv800 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-2855?

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

When was CVE-2015-2855 published?

CVE-2015-2855 was published on 2015-05-30 and last updated on 2026-06-17.

CVE-2015-2855

CVE-2015-2855 is a medium-severity vulnerability in Blue Coat Ssl Visibility Appliance Sv800 Firmware 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

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Blue Coat Ssl Visibility Appliance Sv800 Firmware
Published: 2015-05-30
Last modified: 2026-06-17

Description

The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before 3.8.4 does not set the secure flag for the administrator's cookie in an https session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an http session, a different vulnerability than CVE-2015-4138.

Frequently asked questions

What is CVE-2015-2855?: The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before 3.8.4 does not set the secure flag for the administrator's cookie in an https session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an http session, a different vulnerability than CVE-2015-4138.
How severe is CVE-2015-2855?: CVE-2015-2855 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-2855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2855?: CVE-2015-2855 primarily affects Blue Coat Ssl Visibility Appliance Sv800 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-2855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-2855 published?: CVE-2015-2855 was published on 2015-05-30 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:blue_coat:ssl_visibility_appliance_sv800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:blue_coat:ssl_visibility_appliance_sv1800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:blue_coat:ssl_visibility_appliance_sv3800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:blue_coat:ssl_visibility_appliance_sv2800_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Blue Coat Ssl Visibility Appliance Sv800 Firmware

CVE-2015-2853 — Medium (CVSS 6.8): Session fixation vulnerability in the WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and…
CVE-2015-4138 — Medium (CVSS 4.3): The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before…
CVE-2015-2854 — Medium (CVSS 4.3): The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before…
CVE-2015-2852 — Medium (CVSS 4.3): Cross-site request forgery (CSRF) vulnerability in the WebUI component in Blue Coat SSL Visibility Appliance SV800,…

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