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CVE-2021-39223

20
FAUCET Score

CVE-2021-39223 is a path disclosure vulnerability affecting the Nextcloud Richdocuments application prior to versions 3.8.6 and 4.2.3. It allows an unauthenticated attacker to view the full file path of shared documents by triggering an exception, rated as Medium severity (CVSS 5.3). While the attack complexity is low, the impact is limited to information disclosure and does not affect confidentiality, integrity, or availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.8.6CPE matchmatch criteria
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.2.3CPE matchmatch criteria
cpe:2.3:a:nextcloud:richdocuments:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.02%
Probability of exploitation in next 30 days
EPSS Percentile
59.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0102 is in the 38th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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/richdocuments/pull/1760
PatchThird Party Advisory
github.com / nextcloud/security-advisories/security/advisories/GHSA-rjcc-4cgj-6v93
Third Party Advisory
hackerone.com / reports/1253460
Permissions RequiredThird Party Advisory