Unrated

Second-Order SQL Injection in YesWiki Page Delete API

IdentifiersCVE-2026-52771CWE-89

CVE-2026-52771 is a second-order SQL injection vulnerability in YesWiki affecting versions 4.2.0 through 4.6.5. The flaw is present in the page deletion API, specifically in ApiController::deletePage, where attacker-controlled page tag data can be stored first and later reused in an unsafe SQL context during page deletion. Because the malicious input is persisted before exploitation is triggered, the issue is second-order rather than direct SQL injection. A low-privilege authenticated user can create or modify a page tag containing SQL payloads and subsequently trigger arbitrary SQL execution when the affected deletion workflow processes that stored value. Successful exploitation can enable unauthorized database manipulation and data access within the privileges of the application’s database account.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows arbitrary SQL execution in the YesWiki database context. This can enable time-based blind extraction of data from tables readable by the application, destructive modification of database contents including deletion of records, and denial-of-service conditions through resource-intensive injected queries such as sleep operations. Depending on the data accessible to the application, the vulnerability may also facilitate compromise of administrative accounts through access to credential material or related sensitive records, potentially allowing escalation from low-privilege authenticated access to broader control of the wiki instance.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, restrict or temporarily disable access to the affected page creation and deletion API for low-privilege users, minimize the number of authenticated users who can create or delete pages, and monitor for suspicious page tags containing SQL metacharacters or anomalous page deletion activity. Additional defensive measures may include database activity monitoring and tighter application database permissions to reduce blast radius.

Remediation

Patch, then assume compromise.

Upgrade YesWiki to version 4.6.6 or later. The vulnerable range includes versions 4.2.0 through 4.6.5.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

YeswikiYeswikiapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity