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CVE-2026-53527— LeafWiki Vulnerable to Privilege Escalation via User Self-Service Update

Quick assessment

Affected
perber leafwiki
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LeafWiki 是一款自托管的维基系统。在版本 0.1.0 至 0.10.0 中，用户更新 API 存在特权提升漏洞。经过身份验证的用户可以修改自身账户角色，从而将权限从普通用户（如 ）提升至 。该漏洞的利用需要拥有一个有效的 LeafWiki 已认证用户账户。对于未开放公开注册、仅允许受信任用户注册的实例，实际风险较低。建议用户升级到版本 0.10.1 或更高版本。在官方补丁发布之前，系统管理员应限制账户创建，并确保只有受信任的用户才能在受影响的 LeafWiki 实例上拥有账户。如果可能，应仅将用户更新 AP

CVSS 8.8 · High EPSS 0.24% · P16

Affected Version Matrix 1

VendorProduct Version RangeStatus
perber leafwiki >= 0.1.0, < 0.10.1 affected
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I. Basic Information for CVE-2026-53527

Vulnerability Information
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Vulnerability Title
LeafWiki Vulnerable to Privilege Escalation via User Self-Service Update
Source: CVE Program / CVE List V5
Vulnerability Description
LeafWiki is a self-hosted wiki. Versions 0.1.0 through 0.10.0 have a privilege escalation vulnerability in the user update API. An authenticated user could update their own account role and escalate privileges from a regular user, such as `viewer`, to `admin`. Exploitation requires a valid authenticated LeafWiki user account. Instances without public registration and with only trusted users are at lower practical risk. Users should update to version 0.10.1 or greater. Until a patch is available, operators should restrict account creation and ensure that only trusted users have accounts on affected LeafWiki instances. If possible, access to the user update API should be restricted to trusted users or administrators only.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
perber leafwiki >= 0.1.0, < 0.10.1 -

II. Public POCs for CVE-2026-53527

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8143 chars
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III. Intelligence Information for CVE-2026-53527

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Vendor Advisories for CVE-2026-53527 (1)

Same Patch Batch · perber · 2026-08-21 · 3 CVEs total

CVE-2026-53528 8.8 HIGH FileWiki has path traversal in RenameAsset via unsanitized oldFilename parameter
CVE-2026-53529 4.8 MEDIUM LeafWiki vulnerable to stored XSS via search-result title (highlight() returns raw title i

IV. Related Vulnerabilities

Same product: leafwiki
Same vendor: perber
Same weakness: CWE-269

V. Comments for CVE-2026-53527

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