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Fencer Intel
high 8.9

CVE-2020-15148 in the critical feed json

Unsafe deserialization in Yii 2

published 6y ago modified 4mo ago also GHSA-699q-wcff-g9mj , EUVD-2020-0813

cvss
8.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
77.5%
EPSS 77.5% chance of exploitation in 30 days, percentile 99.5%
public exploits
0
none known, plus a Nuclei check

Summary

Yii 2 (yiisoft/yii2) before version 2.0.38 is vulnerable to remote code execution if the application calls `unserialize()` on arbitrary user input. This is fixed in version 2.0.38. A possible workaround without upgrading is available in the linked advisory.

Patch / fix

  • packagist yiisoft/yii2 2.0.38
  • yiiframework yii 2.0.38

Is CVE-2020-15148 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

77.54% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 8.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 8.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist yiisoft/yii2
<2.0.38
2.0.38

Affected products

  • yiisoft yii2

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.