How severe is CVE-2017-12159?

CVE-2017-12159 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-12159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12159?

CVE-2017-12159 primarily affects Redhat Single Sign On. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-12159?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-12159 published?

CVE-2017-12159 was published on 2017-10-26 and last updated on 2026-06-17.

CVE-2017-12159

CVE-2017-12159 is a high-severity vulnerability in Redhat Single Sign On with a CVSS 3.x base score of 7.5. 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-613.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-613
Affected product: Redhat Single Sign On
Published: 2017-10-26
Last modified: 2026-06-17

Description

It was found that the cookie used for CSRF prevention in Keycloak was not unique to each session. An attacker could use this flaw to gain access to an authenticated user session, leading to possible information disclosure or further attacks.

Frequently asked questions

What is CVE-2017-12159?: It was found that the cookie used for CSRF prevention in Keycloak was not unique to each session. An attacker could use this flaw to gain access to an authenticated user session, leading to possible information disclosure or further attacks.
How severe is CVE-2017-12159?: CVE-2017-12159 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-12159 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12159?: CVE-2017-12159 primarily affects Redhat Single Sign On. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-12159?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-12159 published?: CVE-2017-12159 was published on 2017-10-26 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:redhat:single_sign_on:7.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:single_sign_on:7.1:*:*:*:*:*:*:*
cpe:2.3:a:keycloak:keycloak:-:*:*:*:*:*:*:*

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