How severe is CVE-2017-11427?

CVE-2017-11427 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-11427 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-11427?

CVE-2017-11427 affects Onelogin Pythonsaml. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-11427?

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-2017-11427 published?

CVE-2017-11427 was published on 2019-04-17 and last updated on 2026-06-17.

CVE-2017-11427

CVE-2017-11427 is a high-severity vulnerability in Onelogin Pythonsaml with a CVSS 3.x base score of 7.7. 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: High (CVSS 3.x base score 7.7)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Onelogin Pythonsaml
Published: 2019-04-17
Last modified: 2026-06-17

Description

OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

Frequently asked questions

What is CVE-2017-11427?: OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
How severe is CVE-2017-11427?: CVE-2017-11427 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-11427 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-11427?: CVE-2017-11427 affects Onelogin Pythonsaml. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-11427?: 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-2017-11427 published?: CVE-2017-11427 was published on 2019-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:onelogin:pythonsaml:*:*:*:*:*:*:*:*

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