CVE-2026-25935Public exploitNetwork attack vector

Stored XSS via unescaped task preview description

Published Feb 11, 2026 · Updated Feb 11, 2026

Stored XSS in TaskGlanceTooltip.vue in Vikunja before 1.1.0 allows remote attackers to execute script when a user hovers over a task. The descriptionPreview computation assigns the unescaped task description to innerHTML on a detached div while extracting preview text. An attacker must share a project containing the crafted task and induce another user to view and hover over it, enabling access to or modification of data in that user's browser session.

CVSS severity8.6
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in TaskGlanceTooltip.vue in Vikunja before 1.1.0 allows remote attackers to execute script when a user hovers over a task. The descriptionPreview computation assigns the unescaped task description to innerHTML on a detached div while extracting preview text. An attacker must share a project containing the crafted task and induce another user to view and hover over it, enabling access to or modification of data in that user's browser session.

The record

CVE
CVE-2026-25935
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Vikunja
Product
Vikunja
Classifications
CWE-80, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vikunja · Vikunjaversion=< 1.1.0

Published CVSS scores

8.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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