CVE-2026-117536— REDAXO before 5.21.3 CSRF Token Bypass via users/users Privilege Escalation

Quick assessment

Affected

redaxo core

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 5.21.3 版本之前的 REDAXO 系统中，后端用户管理页面（users/users）存在跨站请求伪造（CSRF）漏洞。该漏洞产生的原因是：CSRF 令牌检查仅在设置了参数时才会执行，而由触发的更新路径则无需此检查。攻击者可诱骗拥有权限的已登录后端用户访问特制的 GET 链接，从而授予其管理员权限、禁用账户，或导致唯一管理员被锁定无法登录。

CVSS 8.8 · High Updated Oct 27, 2026

Possible ATT&CK Techniques 3 AI

T1078 · Valid Accounts T1190 · Exploit Public-Facing Application T1548.002 · Bypass User Account Control

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Vulnerability Information

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Vulnerability Title

REDAXO before 5.21.3 CSRF Token Bypass via users/users Privilege Escalation

Source: CVE Program / CVE List V5

Vulnerability Description

REDAXO before 5.21.3 contains a cross-site request forgery vulnerability in the backend user administration page (users/users) because the CSRF token check only runs when the save parameter is set, while the update path triggered by FUNC_UPDATE does not require it. Attackers can lure a logged-in backend user with the users[] permission to a crafted GET link to grant administrator rights, deactivate accounts, or lock out the sole administrator.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

跨站请求伪造(CSRF)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
redaxo	core	0 ~ 5.21.3	-

II. Public POCs for CVE-2026-117536

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-117536

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Other References for CVE-2026-117536 (2)

https://github.com/redaxo/core/security/advisories/GHSA-mrrj-4f5x-j958 vendor-advisory
https://www.vulncheck.com/advisories/redaxo-before-5.21.3-csrf-token-bypass-via-users-users-privilege-escalation third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-117536

Same Patch Batch · redaxo · 2026-10-27 · 15 CVEs total

CVE-2026-117532	9.8 CRITICAL	REDAXO Core 5.3.0 before 5.21.4 Authentication Bypass via History Plugin
CVE-2026-116896	7.5 HIGH	REDAXO before 5.21.5 Privilege Escalation via Backup Export of Authentication Tables
CVE-2026-116898	7.1 HIGH	REDAXO before 5.21.4 Missing Authorization in Media Pool Bulk Move
CVE-2026-116893	6.8 MEDIUM	REDAXO core before 5.21.5 Missing Authorization in rex_api_package API
CVE-2026-116897	6.5 MEDIUM	REDAXO before 5.21.4 Missing Authorization in Version and History Previews
CVE-2026-116899	6.5 MEDIUM	REDAXO before 5.21.4 Broken Access Control in Slice Operations
CVE-2026-117535	6.1 MEDIUM	REDAXO before 5.21.3 Reflected XSS via opener_link in Media Pool
CVE-2026-117534	5.4 MEDIUM	REDAXO before 5.21.3 CSRF in Article History Plugin
CVE-2026-116900	5.4 MEDIUM	REDAXO before 5.21.4 Stored XSS via Media and Link Input Widgets
CVE-2026-116895	5.4 MEDIUM	REDAXO before 5.21.5 CSRF via Safe Mode Toggle Parameter
CVE-2026-117533	4.4 MEDIUM	REDAXO 5.18.0 before 5.21.4 Stored XSS via Unsanitized Mediapool SVG Uploads
CVE-2026-116894	4.2 MEDIUM	REDAXO before 5.21.5 Insufficient Session Expiration on Password Change
CVE-2026-117538	4.1 MEDIUM	REDAXO before 5.21.0 Reflected XSS via Packages API function Parameter
CVE-2026-117537	4.1 MEDIUM	REDAXO before 5.21.0 Reflected XSS via Metainfo API type Parameter

IV. Related Vulnerabilities

Same product: core

Same vendor: redaxo

Same weakness: CWE-352