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CVE-2026-123529— Vikunja before 2.7.1 Stored CSS Injection via TipTap Table Cell data-background-color

Quick assessment

Affected

go-vikunja vikunja

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.

Vikunja 在 2.7.1 版本之前存在一个存储型 CSS 注入漏洞。拥有项目写入权限的已认证用户可通过未过滤的表格单元格属性注入任意 CSS 代码。攻击者可以存储精心构造的任务描述或评论，从而渲染覆盖整个视口的网络钓鱼叠加层，或强制触发零点击的出站背景图片请求，进而泄露查看者的匿名身份。

CVSS 4.6 · Medium Updated Nov 08, 2026

Possible ATT&CK Techniques 2 AI

T1056.002 · GUI Input Capture T1566.002 · Spearphishing Link

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Vulnerability Information

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Vulnerability Title

Vikunja before 2.7.1 Stored CSS Injection via TipTap Table Cell data-background-color

Source: CVE Program / CVE List V5

Vulnerability Description

Vikunja before 2.7.1 contains a stored CSS injection vulnerability that allows authenticated users with project write access to inject arbitrary CSS via unsanitized table-cell data-background-color attributes. Attackers can store crafted task descriptions or comments to render full-viewport phishing overlays or force zero-click outbound background-image requests that deanonymize viewers.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

不当限制渲染UI层或帧

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
go-vikunja	vikunja	0 ~ 2.7.1	-

II. Public POCs for CVE-2026-123529

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-123529

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Other References for CVE-2026-123529 (2)

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p23m-cq25-pc4j vendor-advisory
https://www.vulncheck.com/advisories/vikunja-before-2.7.1-stored-css-injection-via-tiptap-table-cell-data-background-color third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-123529

Same Patch Batch · go-vikunja · 2026-11-08 · 39 CVEs total

CVE-2026-123531	8.8 HIGH	Vikunja 1.0.0 before 2.7.1 Pagination Limit Bypass via page=0 Parameter
CVE-2026-123522	7.1 HIGH	Vikunja before 2.7.1 Task Information Disclosure via Kanban Bucket Move Webhook
CVE-2026-123520	7.1 HIGH	Vikunja 0.18.0 before 2.7.1 Privilege Escalation via Account Deletion
CVE-2026-123497	6.8 MEDIUM	Vikunja veans before 2.7.1 HTTPS to HTTP Downgrade in Server Discovery
CVE-2026-123528	6.8 MEDIUM	Vikunja before 2.7.1 Insufficient Session Expiration via HTTP Token Middleware
CVE-2026-123513	6.8 MEDIUM	Vikunja before 2.7.1 Auth Token Leak via API URL Change
CVE-2026-123523	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion via Unbounded Avatar Size Cache
CVE-2026-123519	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion DoS via WeKan and Vikunja-File Imports
CVE-2026-123525	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion DoS via Trello, Todoist and Microsoft To Do Migrati
CVE-2026-123501	6.5 MEDIUM	Vikunja before 2.7.1 Memory Exhaustion DoS via Unbounded Image Decodes
CVE-2026-123500	6.2 MEDIUM	Vikunja before 2.7.1 Insecure Permissions on Dump Archive via vikunja dump
CVE-2026-123512	6.1 MEDIUM	Vikunja before 2.7.1 Sensitive Token Exposure via URL Query in Access Logs
CVE-2026-123499	5.9 MEDIUM	Vikunja veans before 2.7.1 Credential Leak via Repo-Controlled .veans.yml Server
CVE-2026-123530	5.9 MEDIUM	Vikunja before 2.7.1 Missing Step-Up Authentication via TOTP Enrollment Endpoints
CVE-2026-123521	5.9 MEDIUM	Vikunja before 2.7.1 Password Brute-Force via TOTP Disable Endpoint
CVE-2026-123524	5.7 MEDIUM	Vikunja 0.23.0 before 2.7.1 Information Disclosure via Webhook related_tasks Payload
CVE-2026-123505	5.5 MEDIUM	Vikunja before 2.7.1 World-Readable Local File Storage and SQLite Database
CVE-2026-123493	5.4 MEDIUM	Vikunja from 2.4.0 before 2.7.1 Authentication Bypass via Bot API Tokens
CVE-2026-123506	5.4 MEDIUM	Vikunja 2.2.0 before 2.7.1 Token Scope Bypass via Project Webhook Endpoints
CVE-2026-123526	5.4 MEDIUM	Vikunja before 2.7.1 Mass Assignment via Team external_id Field

Showing top 20 of 39 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: vikunja

Same vendor: go-vikunja

Same weakness: CWE-1021