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CVE-2023-37260

21
FAUCET Score

CVE-2023-37260 is a high-severity information disclosure vulnerability affecting league/oauth2-server versions 8.3.2 through 8.5.2. It allows an attacker to potentially expose a server's private key within a LogicException message if the key was passed as a string to the CryptKey constructor without a valid passphrase. The vulnerability has a CVSS score of 7.5, indicating a high impact on confidentiality with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.3.2, < 8.5.3CPE matchmatch criteria
cpe:2.3:a:thephpleague:oauth2-server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.95%
Probability of exploitation in next 30 days
EPSS Percentile
57.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0095 is in the 32nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: league/oauth2-serverFixed in: 8.4.2
composerpatch availablevia ghsa
Product: league/oauth2-serverFixed in: 8.5.3
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-wj7q-gjg8-3cpmhigh

league/oauth2-server key exposed in exception message when passing as a string and providing an invalid pass phrase

Jul 6, 2023

References

github.com / thephpleague/oauth2-server/pull/1353
Patch
github.com / thephpleague/oauth2-server/releases/tag/8.5.3
Release Notes
github.com / thephpleague/oauth2-server/security/advisories/GHSA-wj7q-gjg8-3cpm
Vendor Advisory