SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2024-58136

Yiiframework Yii Improper Protection of Alternate Path Vulnerability

KEVCRITICAL 9.8EPSS 87.8%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 23 May 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

Yii 2 before 2.0.52 mishandles the attaching of behavior that is defined by an __class array key, a CVE-2024-4990 regression, as exploited in the wild in February through April 2025.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
87.76% probability · 100th percentile
Public exploits
None in Exploit-DB
CISA KEV
Listed 2 May 2025 · due 23 May 2025
Weakness
CWE-424
Affected
yiiframework/yii
Source
cve@mitre.org
EPSS trend
0%45%90%26 October 2026: 87.76%26 October 202626 October 2026

EPSS 87.8% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see: https://www.yiiframework.com/news/709/please-upgrade-to-yii-2-0-52 ; https://nvd.nist.gov/vuln/detail/CVE-2024-58136

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.