CVE-2022-41922 — `yiisoft/yii` before version 1

`yiisoft/yii` before version 1.1.27 are vulnerable to Remote Code Execution (RCE) if the application calls `unserialize()` on arbitrary user input. This has been patched in 1.1.27.

01What is this vulnerability?

`yiisoft/yii` before version 1.1.27 are vulnerable to Remote Code Execution (RCE) if the application calls `unserialize()` on arbitrary user input. This has been patched in 1.1.27.

02Affected products

Vendor	Product	Versions
yiisoft	yii	< 1.1.27

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-11-23T00:00:00.000Z
• Last modified: 2025-04-23T16:35:42.955Z

09References

• github.com — https://github.com/yiisoft/yii/security/advisories/GHSA-442f-wcwq-fpcf
• github.com — https://github.com/yiisoft/yii/commit/ed67b7cc57216557c5c595c6650cdd2d3aa41c52