CVE-2023-2495

Greeklish-permalink <= 3.3 - Missing Authorization via cyrtrans_ajax_old AJAX action

2023-06-19 00:00

Strategic Overview

Status: Patched in 3.5
Affected Plugin: Greeklish-permalink
Affected Version: <= 3.3
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2023-2495

View all Greeklish-permalink vulnerabilities

At a glance

CVE-2023-2495 is a medium-severity Missing Authorization vulnerability in the Greeklish-permalink WordPress plugin, affecting versions <= 3.3. 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 3.5; sites on affected versions should update now. Disclosed June 2023, reported by Jonas Höbenreich.

Vulnerability Overview

The Greeklish-permalink plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'cyrtrans_ajax_old' AJAX action in versions up to, and including, 3.3. This makes it possible for unauthenticated attackers to modify post slugs.

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-862: Missing Authorization

Greeklish-permalink <= 3.3 carries this weakness at cyrtrans_ajax_old, and reaching it takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Greeklish-permalink the fix is 3.5: builds <= 3.3 are affected, anything from 3.5 onward is not.

Remediation

Update to version 3.5, 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: Greeklish-permalink 3.5 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-2495 https://www.wordfence.com/threat-intel/vulnerabilities/id/3be0e82c-f9a8-42a5-9abb-24cc60e03944 https://nvd.nist.gov/vuln/detail/CVE-2023-2495

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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