CVE-2023-27437

Event Espresso 4 Decaf <= 4.10.44.decaf - Feature Bypass

2023-03-05 00:00

Strategic Overview

Status: Patched in 4.10.45.decaf
Affected Plugin: Event Espresso – Event Registration & Ticketing Sales
Affected Version: <= 4.10.44.decaf
CVSS: 5.3Medium
Weakness type: CWE-354 · Improper Validation of Integrity Check Value
CVE: CVE-2023-27437

View all Event Espresso – Event Registration & Ticketing Sales vulnerabilities

At a glance

CVE-2023-27437 is a medium-severity Improper Validation of Integrity Check Value vulnerability in the Event Espresso WordPress plugin, affecting versions <= 4.10.44.decaf. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 4.10.45.decaf; sites on affected versions should update now. Disclosed March 2023, reported by yuyudhn.

Vulnerability Overview

The Event Espresso 4 Decaf plugin for WordPress is vulnerable to bypass of a plugin feature in versions up to, and including, 4.10.44.decaf. This is due to incorrect validation of the number of tickets ordered per order when making a ticket purchase. This makes it possible for unauthenticated individuals to purchase more tickets than the maximum allowed per order.

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 privileges on the target site, and no interaction from a victim user.

CWE-354: Improper Validation of Integrity Check Value

The product does not validate or incorrectly validates the integrity check values or checksums of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission.

Remediation

Update to version 4.10.45.decaf, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Event Espresso 4.10.45.decaf closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-27437 https://www.wordfence.com/threat-intel/vulnerabilities/id/d55f10f3-5484-4b90-80da-3d91f409fe04 https://nvd.nist.gov/vuln/detail/CVE-2023-27437

Related records

Other vulnerabilities in Event Espresso – Event Registration & Ticketing Sales

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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