How severe is CVE-2020-13827?

CVE-2020-13827 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-13827 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13827?

CVE-2020-13827 affects Phplist. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13827?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-13827 published?

CVE-2020-13827 was published on 2020-06-04 and last updated on 2026-06-17.

CVE-2020-13827

CVE-2020-13827 is a medium-severity vulnerability in Phplist with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Phplist
Published: 2020-06-04
Last modified: 2026-06-17

Description

phpList before 3.5.4 allows XSS via /lists/admin/user.php and /lists/admin/users.php.

Frequently asked questions

What is CVE-2020-13827?: phpList before 3.5.4 allows XSS via /lists/admin/user.php and /lists/admin/users.php.
How severe is CVE-2020-13827?: CVE-2020-13827 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-13827 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13827?: CVE-2020-13827 affects Phplist. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13827?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-13827 published?: CVE-2020-13827 was published on 2020-06-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phplist:phplist:*:*:*:*:*:*:*:*

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