How severe is CVE-2015-20108?

CVE-2015-20108 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-20108 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-20108?

CVE-2015-20108 affects Onelogin Ruby-saml. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-20108?

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

When was CVE-2015-20108 published?

CVE-2015-20108 was published on 2023-05-27 and last updated on 2026-06-17.

CVE-2015-20108

CVE-2015-20108 is a critical-severity vulnerability in Onelogin Ruby-saml with a CVSS 3.x base score of 9.8. 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-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Onelogin Ruby-saml
Published: 2023-05-27
Last modified: 2026-06-17

Description

xml_security.rb in the ruby-saml gem before 1.0.0 for Ruby allows XPath injection and code execution because prepared statements are not used.

Frequently asked questions

What is CVE-2015-20108?: xml_security.rb in the ruby-saml gem before 1.0.0 for Ruby allows XPath injection and code execution because prepared statements are not used.
How severe is CVE-2015-20108?: CVE-2015-20108 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-20108 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-20108?: CVE-2015-20108 affects Onelogin Ruby-saml. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-20108?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-20108 published?: CVE-2015-20108 was published on 2023-05-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*

More vulnerabilities in Onelogin Ruby-saml

CVE-2024-45409 — Critical (CVSS 10.0): The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <=…
CVE-2025-25292 — Critical (CVSS 9.8): ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass…
CVE-2025-25291 — Critical (CVSS 9.8): ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. An authentication bypass…
CVE-2025-66568 — Critical (CVSS 9.1): The ruby-saml library implements the client side of an SAML authorization. Versions up to and including 1.12.4, are…
CVE-2025-66567 — Critical (CVSS 9.1): The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and…
CVE-2017-11428 — High (CVSS 7.7): OneLogin Ruby-SAML 1.6.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs…

All CVEs affecting Onelogin Ruby-saml →

Other CWE-77 (Command Injection) vulnerabilities

CVE-2026-23652 — Critical (CVSS 10.0): Improper neutralization of special elements used in a command ('command injection') in Microsoft Power Pages allows an…
CVE-2025-59818 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file…
CVE-2025-64093 — Critical (CVSS 10.0): Remote Code Execution vulnerability that allows unauthenticated attackers to inject arbitrary commands into the…
CVE-2025-64090 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute commands via the hostname of the device.
CVE-2025-61492 — Critical (CVSS 10.0): A command injection vulnerability in the execute_command function of terminal-controller-mcp 0.1.7 allows attackers to…
CVE-2025-10035 — Critical (CVSS 10.0): A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged…

Browse all CWE-77 (Command Injection) vulnerabilities →