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CVE-2020-15222

20
FAUCET Score

CVE-2020-15222 is a high-severity vulnerability affecting ORY Fosite versions prior to 0.31.0, where the system fails to enforce the uniqueness of the 'jti' value during "private_key_jwt" client authentication, violating OpenID Connect specifications. This oversight allows for potential token reuse, leading to high impact on confidentiality and integrity. While the CVSS score is 8.1, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.31.0CPE matchmatch criteria
cpe:2.3:a:ory:fosite:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.87%
Probability of exploitation in next 30 days
EPSS Percentile
55.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0087 is in the 56th percentile among its peer group of 14,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/ory/fositeFixed in: 0.31.0

Vendor Advisories (1)

goGHSA-v3q9-2p3m-7g43high

Token reuse in Ory fosite

May 24, 2021

References

github.com / ory/fosite/commit/0c9e0f6d654913ad57c507dd9a36631e1858a3e9
PatchThird Party Advisory
github.com / ory/fosite/security/advisories/GHSA-v3q9-2p3m-7g43
ExploitThird Party Advisory
openid.net / specs/openid-connect-core-1_0.html
Third Party Advisory