CVE-2020-15223

Name: CVE-2020-15223
Creator: NVD / NIST
Published: 2020-09-24T17:15:13.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8/10EPSS 1.59%

Last modified Jun 17, 2026

CVE-2020-15223 is a high-severity vulnerability rated 8/10 on the CVSS scale. In ORY Fosite (the security first OAuth2 & OpenID Connect framework for Go) before version 0.34.0, the `TokenRevocationHandler` ignores errors coming from the storage. This can lead to unexpected 200 status codes indicating successful revocation while the token is still valid. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

Description

In ORY Fosite (the security first OAuth2 & OpenID Connect framework for Go) before version 0.34.0, the `TokenRevocationHandler` ignores errors coming from the storage. This can lead to unexpected 200 status codes indicating successful revocation while the token is still valid. Whether an attacker can use this for her advantage depends on the ability to trigger errors in the store. This is fixed in version 0.34.0

Metrics

CVSS 3.1

8/10

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

EPSS Probability

1.59%

72.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ory	Fosite	< 0.34.0

References

https://github.com/ory/fosite/commit/03dd55813f5521985f7dd64277b7ba0cf1441319Patch, Third Party Advisory
https://github.com/ory/fosite/security/advisories/GHSA-7mqr-2v3q-v2wmThird Party Advisory
https://tools.ietf.org/html/rfc7009#section-2.2.1Third Party Advisory
https://github.com/ory/fosite/commit/03dd55813f5521985f7dd64277b7ba0cf1441319Patch, Third Party Advisory
https://github.com/ory/fosite/security/advisories/GHSA-7mqr-2v3q-v2wmThird Party Advisory
https://tools.ietf.org/html/rfc7009#section-2.2.1Third Party Advisory

Timeline

Published: Sep 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15223?

How severe is CVE-2020-15223?

CVE-2020-15223 has a CVSS score of 8/10 (HIGH severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15223?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15223?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST