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CVE-2026-90893— MISP UserSettingsController CSRF Protection Bypass on setTheme, setHomePage, and eventIndexColumnToggle Endpoints

Quick assessment

Affected
MISP MISP
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.

MISP是MISP组织开源的一个威胁情报共享与分析平台。 MISP 2.5.46之前版本存在跨站请求伪造漏洞，该漏洞源于UserSettingsController中setTheme、setHomePage和eventIndexColumnToggle操作被加入unlockedActions列表，禁用了CSRF验证，导致容易受到跨站请求伪造攻击，可能修改用户的主题、默认主页URL和事件索引列显示设置，其中setHomePage可将默认登录页面重定向至攻击者控制的任意URL，可能用于钓鱼或社会工程。

CVSS 5.1 · Medium EPSS 0.26% · P18

Affected Version Matrix 1

VendorProduct Version RangeStatus
MISP MISP < 2.5.46 affected
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I. Basic Information for CVE-2026-90893

Vulnerability Information
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Vulnerability Title
MISP UserSettingsController CSRF Protection Bypass on setTheme, setHomePage, and eventIndexColumnToggle Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
MISP contains a Cross-Site Request Forgery (CSRF) vulnerability in the UserSettingsController. The actions setTheme, setHomePage, and eventIndexColumnToggle were explicitly added to the Security component's unlockedActions list, which disabled all CSRF validation (both token and field-hash checks) for those endpoints. Because these endpoints accept POST requests and modify per-user application state (theme selection, default homepage URL, and event index column visibility), an attacker who can induce a logged-in MISP user to load a malicious page (e.g., via a crafted link, embedded image, or auto-submitting form) can forge requests that alter the victim's settings without their knowledge or consent. The most impactful action is setHomePage, which allows an attacker to redirect the victim's default landing page to an arbitrary attacker-controlled URL, potentially facilitating phishing or further social engineering. The setTheme action can alter the user's visual theme, and eventIndexColumnToggle can change which columns are displayed in the event index view. No authentication bypass is involved; the victim must already be authenticated to MISP. The vulnerability was reported by the Scottish Government National Cyber Team. Version affected: ≤2.5.45
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
MISP 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MISP是MISP组织开源的一个威胁情报共享与分析平台。 MISP 2.5.46之前版本存在跨站请求伪造漏洞，该漏洞源于UserSettingsController中setTheme、setHomePage和eventIndexColumnToggle操作被加入unlockedActions列表，禁用了CSRF验证，导致容易受到跨站请求伪造攻击，可能修改用户的主题、默认主页URL和事件索引列显示设置，其中setHomePage可将默认登录页面重定向至攻击者控制的任意URL，可能用于钓鱼或社会工程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MISP MISP 0 ~ 2.5.46 -

II. Public POCs for CVE-2026-90893

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III. Intelligence Information for CVE-2026-90893

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Patches & Fixes for CVE-2026-90893 (1)

Same Patch Batch · MISP · 2026-09-14 · 5 CVEs total

CVE-2026-90961 9.3 CRITICAL MISP LdapAuth and LinOTPAuth Authentication Bypass via Empty or Non-String Credentials
CVE-2026-90895 8.4 HIGH MISP Interactive CLI Shell: Authorization Bypass, Credential Exposure, and Terminal Inject
CVE-2026-90957 5.1 MEDIUM MISP: Stored XSS via Inline-Served SVG Organisation Logos and Report Pictures
CVE-2026-90955 4.6 MEDIUM MISP CLI Shell Audit Logs Lose User Identity and CLI Marker After First Lazy Model Load

IV. Related Vulnerabilities

Same product: MISP
Same vendor: MISP
Same weakness: CWE-352