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CVE-2023-30539

27
FAUCET Score

CVE-2023-30539 is a high-severity vulnerability affecting Nextcloud Server and the Nextcloud Files automated tagging app. This flaw allows an authenticated attacker to manipulate system tags and workflows, potentially granting or restricting access to files in unintended ways. With a CVSS score of 8.8 (High), it has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.14.0, < 1.14.2CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_files_automated_tagging:*:*:*:*:*:*:*:*
>= 1.15.0, < 1.15.3CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_files_automated_tagging:*:*:*:*:*:*:*:*
1.11.0CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_files_automated_tagging:1.11.0:*:*:*:*:*:*:*
1.12.0CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_files_automated_tagging:1.12.0:*:*:*:*:*:*:*
1.13.0CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_files_automated_tagging:1.13.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.3
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 37th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 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 0.1 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/files_automatedtagging/pull/705
Issue TrackingPatch
github.com / nextcloud/security-advisories/security/advisories/GHSA-3m2f-v8x7-9w99
Vendor Advisory
github.com / nextcloud/server/pull/37252
Patch
hackerone.com / reports/1895976
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