CVE-2026-63360Network attack vector

Authenticated browser script execution via unencoded action parameter

Published Aug 26, 2026 · Updated Aug 27, 2026

Reflected XSS in LimeSurvey 7.0.5 allows remote authenticated users to execute script in a user's browser through a crafted activation URL. The user activation confirmation endpoint copies the action query parameter into a hidden input value without HTML attribute encoding, so crafted markup escapes the attribute. Exploitation requires an authenticated workflow and active interaction with the crafted URL; successful script runs in the LimeSurvey origin and can read or alter browser-accessible data.

CVSS severity7.4
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in LimeSurvey 7.0.5 allows remote authenticated users to execute script in a user's browser through a crafted activation URL. The user activation confirmation endpoint copies the action query parameter into a hidden input value without HTML attribute encoding, so crafted markup escapes the attribute. Exploitation requires an authenticated workflow and active interaction with the crafted URL; successful script runs in the LimeSurvey origin and can read or alter browser-accessible data.

The record

CVE
CVE-2026-63360
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
LimeSurvey GmbH
Product
LimeSurvey
Classifications
CWE-79, CAPEC-591
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=7.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LimeSurvey GmbH · LimeSurveyversion=7.0.5

Published CVSS scores

7.4Fluid AttacksCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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