CVE-2026-63361Public exploitNetwork attack vector

Authenticated-session script execution via unencoded editor parameters

Published Aug 14, 2026 · Updated Aug 14, 2026

Reflected XSS in LimeSurvey Community Edition 7.0.5 allows remote attackers to run script in an authenticated user's browser. HtmlEditorPop::index() passes the text and name parameters through sanitize_xss_string(), while pop_editor_view.php inserts them unencoded into the title element and inline JavaScript. The attacker needs no account, but an authenticated user must open the crafted URL; injected code runs with that session's origin and permissions.

CVSS severity8.5
High
EPSS probability0.30%
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 Community Edition 7.0.5 allows remote attackers to run script in an authenticated user's browser. HtmlEditorPop::index() passes the text and name parameters through sanitize_xss_string(), while pop_editor_view.php inserts them unencoded into the title element and inline JavaScript. The attacker needs no account, but an authenticated user must open the crafted URL; injected code runs with that session's origin and permissions.

The record

CVE
CVE-2026-63361
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
LimeSurvey GmbH
Product
LimeSurvey
Classifications
CWE-79, CAPEC-591, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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 privilegesunauthenticated

What is affected?

LimeSurvey GmbH · LimeSurveyversion=7.0.5

Published CVSS scores

8.5Fluid AttacksCVSS:4.0/AV:N/AC:L/AT:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-591Reflected XSS
T1204.001Malicious Link

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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