CVE-2022-29434

Spiffy Calendar <= 4.9.0 - Edit/Delete event via IDOR

2022-02-10 13:33

Strategic Overview

Status: Patched in 4.9.1
Affected Plugin: Spiffy Calendar
Affected Version: <= 4.9.0
CVSS: 6.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2022-29434

View all Spiffy Calendar vulnerabilities

At a glance

CVE-2022-29434 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Spiffy Calendar WordPress plugin, affecting versions <= 4.9.0. It carries a CVSS score of 6.3 (reachable over the network; low attack complexity). The issue is fixed in version 4.9.1; sites on affected versions should update now. Disclosed February 2022, reported by R3N0.

Vulnerability Overview

Insecure Direct Object References (IDOR) vulnerability in Spiffy Plugins Spiffy Calendar <= 4.9.0 at WordPress allows an attacker to edit or delete events.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Spiffy Calendar <= 4.9.0 takes a caller who can reach the endpoint. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Spiffy Calendar the fix is 4.9.1: builds <= 4.9.0 are affected, anything from 4.9.1 onward is not.

Remediation

Update to version 4.9.1, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Spiffy Calendar 4.9.1 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-29434 https://www.wordfence.com/threat-intel/vulnerabilities/id/85af2186-0807-4926-9285-f8ac93f76b93 https://nvd.nist.gov/vuln/detail/CVE-2022-29434

Related records

Other vulnerabilities in Spiffy Calendar

CVSS Vector

6.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityLow

This record contains material that is subject to copyright

CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

https://www.cve.org/Legal/TermsOfUse

Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

https://www.wordfence.com/wordfence-intelligence-terms-and-conditions/