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CVE-2022-39339

18
FAUCET Score

CVE-2022-39339 affects the user_oidc OpenID Connect backend for Nextcloud, allowing sensitive OIDC client credentials and tokens to be transmitted in plain text over HTTP. This vulnerability has a CVSS score of 4.3 (Medium), indicating a low-complexity network attack that could lead to a partial loss of confidentiality if an attacker monitors traffic. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE. Users are advised to upgrade to user_oidc v1.2.1 or enforce HTTPS for Nextcloud access.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.1CPE matchmatch criteria
cpe:2.3:a:nextcloud:openid_connect_user_backend:*:*:*:*:*:nextcloud:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 44th percentile among its peer group of 21,958 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / nextcloud/security-advisories/security/advisories/GHSA-2vff-cq8h-chhg
PatchThird Party Advisory
github.com / nextcloud/user_oidc/pull/495
PatchThird Party Advisory
hackerone.com / reports/1687005
Permissions RequiredThird Party Advisory