CVE-2020-35933: thenewsletterplugin newsletter Cross-site Scripting
Vulnerability summary
CVE-2020-35933 is a medium (CVSS 6.5) Cross-site Scripting vulnerability in thenewsletterplugin newsletter. EPSS estimates a 0.86% chance of exploitation in the next 30 days, higher than 58.3% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 6.8.2.
Timeline
- 01-01-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
- wordfenceSource6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
EPSS trend
Probability
0.86%
Chance of exploitation in the next 30 days
Percentile
58%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.85% on 24-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (wordfence.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Thenewsletterplugin1 product
- newsletter< 6.8.2
Wordpress1 product
- newsletter< 6.8.2
2 vendors · 2 products
References
2 links- www.wordfence.com/blog/2020/08/newsletter-plugin-vulnerabilities-affect-over-300000-sites/X Refsource MISCExploitThird Party Advisory