CVE-2026-52762 Details
Description
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki Bazar contains a stored Server-Side Template Injection (SSTI) vulnerability in the semantic template feature that can be escalated to confirmed Remote Code Execution (RCE). An authenticated administrator can place arbitrary Twig expressions into the Semantic template (Twig) field (bn_sem_template), and that content is later executed server-side when public semantic endpoints are requested. This issue has been patched in version 4.6.6.
A stored Server-Side Template Injection (SSTI) vulnerability has been identified in YesWiki Bazar versions prior to 4.6.6. This vulnerability resides in the semantic template feature, allowing an authenticated administrator to inject arbitrary Twig expressions into the Semantic template (Twig) field. The injected content is executed server-side when public semantic endpoints are accessed, potentially leading to Remote Code Execution (RCE).
Users are advised to upgrade to YesWiki version 4.6.6 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 5, 2026CISA-ADP
Assessed Sep 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/YesWiki/yeswiki/security/advisories/GHSA-65p8-9433-jpcp | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/YesWiki/yeswiki/commit/89462f1577a8a1fe7fcff75e77b5058a74d8047b | [email protected] | Source CodeVendor |
| https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6 | [email protected] | Release NotesVendor |
| https://github.com/YesWiki/yeswiki/security/advisories/GHSA-65p8-9433-jpcp | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1336 | Improper Neutralization of Special Elements Used in a Template Engine | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| YesWiki | < 4.6.6 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 8, 2026 | CVE Modified | CISA-ADP |
| Sep 5, 2026 | New CVE Received | [email protected] |