Cyber Resilience

CVE-2024-0855

MediumPublic PoC

Published: 27 February 2024

Published
27 February 2024
Modified
01 May 2025
KEV Added
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Patch
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CVSS Score v3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0022 44.6th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-0855 is a medium-severity an unspecified weakness vulnerability in Spiffyplugins Spiffy Calendar. Its CVSS base score is 5.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Masquerade Account Name (T1036.010); ranked at the 44.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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+.

CWE(s)
NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1036.010 Masquerade Account Name Stealth
Adversaries may match or approximate the names of legitimate accounts to make newly created ones appear benign.
attack.mitre.org →
T1684.001 Impersonation Stealth
Adversaries may impersonate a trusted person or organization in order to persuade and trick a target into performing some action on their behalf.
attack.mitre.org →
Why these techniques?

The vulnerability enables low-privileged (Contributor+) users to spoof the event_author parameter as an admin ID, masquerading the account name (T1036.010) and impersonating a legitimate higher-privileged user (T1656) to deceive admins.

Affected Assets

spiffyplugins
spiffy calendar
≤ 4.9.9

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References