CVE-2017-20035Public exploitNetwork attack vector

Stored script execution via unencoded subscribe-page fields

Published Jun 10, 2022 · Updated Apr 15, 2025

Stored XSS in phpList 3.2.6 allows remote authenticated users to run script in another user's browser through a crafted subscribe-page field. Subscribe-page parameters, including the title, are stored and later echoed in public and administrative pages without output encoding. Exploitation requires permission to edit subscribe pages and execution occurs when another user visits a poisoned subscribe page or its administrative overview.

CVSS severity3.5
Low
EPSS probability0.60%
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 phpList 3.2.6 allows remote authenticated users to run script in another user's browser through a crafted subscribe-page field. Subscribe-page parameters, including the title, are stored and later echoed in public and administrative pages without output encoding. Exploitation requires permission to edit subscribe pages and execution occurs when another user visits a poisoned subscribe page or its administrative overview.

The record

CVE
CVE-2017-20035
Published
Jun 10, 2022
Updated
Apr 15, 2025
Vendor
phpList
Product
phpList
Classifications
CWE-80, CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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?

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

  1. Affected versionversion=3.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

phpList · phpListversion=3.2.6

Published CVSS scores

5.4NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NISTAV:N/AC:M/Au:S/C:N/I:P/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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.

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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
Privilegesauthenticated
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')
T1189Drive-by Compromise

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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