XSS in Anti-Spam By Cleantalk. Spam Protection

CVE-2026-8071

The Anti-Spam by CleanTalk. Spam protection WordPress plugin before 6.79 does not properly sanitize content within a custom shortcode used in its email-encoding feature, allowing unauthenticated attackers to inject arbitrary web scripts into approved comments that will execute when any user (including administrators) views the post.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-8071: held from 0.004 to 0.005.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

  • Anti-Spam By Cleantalk. Spam Protection — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-8071?
CVE-2026-8071 is a high-severity vulnerability in Anti-Spam By Cleantalk. Spam Protection, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-06-10.
How severe is CVE-2026-8071?
High severity. CVSS v3 base score is 8.8 out of 10.