Nextcloud Nextcloud Calendar

productDE

cpe:/a:nextcloud:nextcloud:calendar

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

KEV-listed

public exploit

EPSS ≥ 10%

critical

by severity

0critical0high9medium1low

updated 2026-10-27

vulnerabilities (15)

Related CVEs.

sort

ID	severity	EPSS	exploitable	patched	published	affected
CVE-2025-66510US	medium4.9	0.36% (29th)	—	no fix	2025-12-05	—
CVE-2025-66550US	—	0.34% (27th)	—	no fix	2025-12-05	—
CVE-2025-66515US	—	0.31% (24th)	—	no fix	2025-12-05	—
CVE-2025-66552US	medium4.3	0.31% (24th)	—	no fix	2025-12-05	—
CVE-2025-66549US	low2.7	0.30% (22nd)	—	no fix	2025-12-05	—
CVE-2025-66511US	medium6.5OT elevated	0.29% (22nd)	—	no fix	2025-12-05	—
CVE-2025-66513US	medium5.3	0.29% (22nd)	—	no fix	2025-12-05	—
CVE-2025-66545US	medium4.3	0.28% (21st)	—	no fix	2025-12-05	—
CVE-2025-66512US	medium6.1	0.28% (20th)	—	no fix	2025-12-05	—
CVE-2025-66547US	—	0.28% (20th)	—	no fix	2025-12-05	—
CVE-2025-66553US	—	0.28% (20th)	—	no fix	2025-12-05	—
CVE-2025-66551US	medium4.3	0.25% (17th)	—	no fix	2025-12-05	—
CVE-2025-66514US	medium5.4	0.25% (16th)	—	no fix	2025-12-05	—
CVE-2025-66548US	medium5.5	0.15% (4th)	—	no fix	2025-12-05	—
CVE-2025-66546US	—	0.14% (3rd)	—	no fix	2025-12-05	—

The flaw types (CWEs) most of these CVEs share.

CWE-639Authorization Bypass Through User-Controlled Key5 CVEs
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')2 CVEs
CWE-116Improper Encoding or Escaping of Output1 CVEs
CWE-209Generation of Error Message Containing Sensitive Information1 CVEs
CWE-241Improper Handling of Unexpected Data Type1 CVEs
CWE-287Improper Authentication1 CVEs
CWE-330Use of Insufficiently Random Values1 CVEs
CWE-359Exposure of Private Personal Information to an Unauthorized Actor1 CVEs

Which sources assert this record, and when.

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