How severe is CVE-2020-35933?

CVE-2020-35933 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2020-35933 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-2020-35933?

CVE-2020-35933 affects Thenewsletterplugin Newsletter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35933?

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

When was CVE-2020-35933 published?

CVE-2020-35933 was published on 2021-01-01 and last updated on 2026-06-17.

CVE-2020-35933

CVE-2020-35933 is a medium-severity vulnerability in Thenewsletterplugin Newsletter with a CVSS 3.x base score of 6.5. 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 6.5)
CVSS v2: 3.5
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Thenewsletterplugin Newsletter
Published: 2021-01-01
Last modified: 2026-06-17

Description

A Reflected Authenticated Cross-Site Scripting (XSS) vulnerability in the Newsletter plugin before 6.8.2 for WordPress allows remote attackers to trick a victim into submitting a tnpc_render AJAX request containing either JavaScript in an options parameter, or a base64-encoded JSON string containing JavaScript in the encoded_options parameter.

Frequently asked questions

What is CVE-2020-35933?: A Reflected Authenticated Cross-Site Scripting (XSS) vulnerability in the Newsletter plugin before 6.8.2 for WordPress allows remote attackers to trick a victim into submitting a tnpc_render AJAX request containing either JavaScript in an options parameter, or a base64-encoded JSON string containing JavaScript in the encoded_options parameter.
How severe is CVE-2020-35933?: CVE-2020-35933 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2020-35933 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-2020-35933?: CVE-2020-35933 affects Thenewsletterplugin Newsletter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35933?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35933 published?: CVE-2020-35933 was published on 2021-01-01 and last updated on 2026-06-17.

References

https://www.wordfence.com/blog/2020/08/newsletter-plugin-vulnerabilities-affect-over-300000-sites/

Affected products (1)

cpe:2.3:a:thenewsletterplugin:newsletter:*:*:*:*:*:wordpress:*:*

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