How severe is CVE-2015-4138?

CVE-2015-4138 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-4138 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-2015-4138?

CVE-2015-4138 primarily affects Blue Coat Ssl Visibility Appliance Sv1800 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-2015-4138?

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

When was CVE-2015-4138 published?

CVE-2015-4138 was published on 2015-05-30 and last updated on 2026-06-17.

CVE-2015-4138

CVE-2015-4138 is a medium-severity vulnerability in Blue Coat Ssl Visibility Appliance Sv1800 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 Sv1800 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 include the HTTPOnly flag in a Set-Cookie header for the administrator's cookie, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie, a different vulnerability than CVE-2015-2855.

Frequently asked questions

What is CVE-2015-4138?: 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 include the HTTPOnly flag in a Set-Cookie header for the administrator's cookie, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie, a different vulnerability than CVE-2015-2855.
How severe is CVE-2015-4138?: CVE-2015-4138 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-4138 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-2015-4138?: CVE-2015-4138 primarily affects Blue Coat Ssl Visibility Appliance Sv1800 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-2015-4138?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4138 published?: CVE-2015-4138 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_sv1800_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:blue_coat:ssl_visibility_appliance_sv800_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 Sv1800 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-2015-2855 — 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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