CVE-2018-8927

MEDIUMNVD 5.46.5▲Trending — 3 sources updated this week

5.4

Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) cal_id or (2) original_cal_id parameter.

CVSS v3: 5.4
EG Score: 6.5(medium)
EPSS: 30.4%
KEV: Not listed

Published

June 14, 2018

Last Modified

November 21, 2024

References (2)

security@synologyhttps://www.synology.com/en-global/support/security/Synology_SA_18_16
af854a3a-2127-422b-91ae-364da2661108https://www.synology.com/en-global/support/security/Synology_SA_18_16

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-863Incorrect Authorization

Data Freshness Timeline

(refreshed 11× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 06:37 UTCEG score recompute
2026-05-28 06:37 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 18:46 UTCOSV refresh

Frequently asked(5)

What is CVE-2018-8927?

CVE-2018-8927 is a medium vulnerability published on June 14, 2018. Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) calid or (2) originalcal_id parameter.

When was CVE-2018-8927 disclosed?

CVE-2018-8927 was first published in the National Vulnerability Database on June 14, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-8927 actively exploited?

CVE-2018-8927 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-8927?

CVE-2018-8927 has a CVSS v3 base score of 5.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.5.

How do I remediate CVE-2018-8927?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-8927, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-8927

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-8927?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)