What is CVE-2024-0855?

CVE-2024-0855 is a medium-severity vulnerability in Spiffyplugins Spiffy Calendar, classified under CWE-863 INCORRECT AUTHORIZATION. CVSS score: 5.3/10. Published 2024-02-27.

How severe is CVE-2024-0855?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2024-0855 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Spiffyplugins Spiffy Calendar

CVE-2024-0855

The Spiffy Calendar WordPress plugin before 4.9.9 doesn't check the event_author parameter, and allows any user to alter it when creating an event, leading to deceiving users/admins that a page was created by a Contributor+.

Published 2024-02-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (39.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Spiffyplugins Spiffy Calendar
Spiffy Calendar — versions 0

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/5d5da91e-3f34-46b0-8db2-354a88bdf934/ (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2024-0855?: CVE-2024-0855 is a medium-severity vulnerability in Spiffyplugins Spiffy Calendar, classified under CWE-863 INCORRECT AUTHORIZATION. CVSS score: 5.3/10. Published 2024-02-27.
How severe is CVE-2024-0855?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2024-0855 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.