CVE-2024-42903Public exploitNetwork attack vector

Account takeover via unvalidated reset-link host

Published Sep 3, 2024 · Updated Mar 13, 2025

Host header injection in LimeSurvey 6.6.1+240806 and earlier allows remote attackers to redirect password-reset links to a malicious domain. The password-reset flow uses the unvalidated HTTP Host header when constructing the emailed reset URL instead of restricting it to an allowed host. A victim must request a reset and follow the crafted link; the attacker-controlled domain then receives the reset token, enabling account takeover.

CVSS severity6.5
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Host header injection in LimeSurvey 6.6.1+240806 and earlier allows remote attackers to redirect password-reset links to a malicious domain. The password-reset flow uses the unvalidated HTTP Host header when constructing the emailed reset URL instead of restricting it to an allowed host. A victim must request a reset and follow the crafted link; the attacker-controlled domain then receives the reset token, enabling account takeover.

The record

CVE
CVE-2024-42903
Published
Sep 3, 2024
Updated
Mar 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1566.002Phishing: Spearphishing 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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