What is CVE-2017-20034?

CVE-2017-20034 is a low-severity vulnerability in Phplist, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 3.5/10. Published 2022-06-10.

How severe is CVE-2017-20034?

Low severity. CVSS v3 base score is 3.5 out of 10.

XSS in Phplist

CVE-2017-20034

A vulnerability classified as problematic was found in PHPList 3.2.6. This vulnerability affects unknown code of the file /lists/admin/ of the component List Name. The manipulation leads to cross site scripting (Persistent). The attack can be initiated remotely. Upgrading to version 3.3.1 is able to address this issue. It is recommended to upgrade the affected component.

Published 2022-06-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Phplist — versions 3.2.6
Unspecified Phplist — versions 3.2.6

Weakness classification (CWE)

References

seclists.org/fulldisclosure/2017/Mar/46 (Exploit, Mailing List, Third Party Advisory)
vuldb.com/ (Third Party Advisory)

Frequently asked questions

What is CVE-2017-20034?: CVE-2017-20034 is a low-severity vulnerability in Phplist, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 3.5/10. Published 2022-06-10.
How severe is CVE-2017-20034?: Low severity. CVSS v3 base score is 3.5 out of 10.