CVE-2020-36599
CVE-2020-36599 is a critical-severity vulnerability in Omniauth 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-116.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 1% (60th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-116
- Affected product: Omniauth
- Published:
- Last modified:
Description
lib/omniauth/failure_endpoint.rb in OmniAuth before 1.9.2 (and before 2.0) does not escape the message_key value.
Frequently asked questions
- What is CVE-2020-36599?
- lib/omniauth/failure_endpoint.rb in OmniAuth before 1.9.2 (and before 2.0) does not escape the message_key value.
- How severe is CVE-2020-36599?
- CVE-2020-36599 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-2020-36599 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-36599?
- CVE-2020-36599 primarily affects Omniauth. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2020-36599?
- 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-2020-36599 published?
- CVE-2020-36599 was published on 2022-08-18 and last updated on 2026-06-17.
References
- https://github.com/omniauth/omniauth/commit/43a396f181ef7d0ed2ec8291c939c95e3ed3ff00#diff-575abda9deb9b1a77bf534e898a923029b9a61e991d626db88dc6e8b34260aa2
- https://rubygems.org/gems/omniauth/versions/1.9.2
Affected products (2)
- cpe:2.3:a:omniauth:omniauth:*:*:*:*:*:-:*:*
- cpe:2.3:a:omniauth:omniauth:2.0.0:pre.rc1:*:*:*:*:*:*
More vulnerabilities in Omniauth
- CVE-2015-9284 — High (CVSS 8.8): The request phase of the OmniAuth Ruby gem (1.9.1 and earlier) is vulnerable to Cross-Site Request Forgery when used as…
- CVE-2017-18076 — High (CVSS 7.5): In strategy.rb in OmniAuth before 1.3.2, the authenticity_token value is improperly protected because POST (in addition…
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