What is CVE-2026-1055?

CVE-2026-1055 is a medium-severity vulnerability in Talkjs, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-02-19.

How severe is CVE-2026-1055?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Talkjs

CVE-2026-1055

The TalkJS plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 0.1.15 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (10.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Talkjs — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-1055?: CVE-2026-1055 is a medium-severity vulnerability in Talkjs, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-02-19.
How severe is CVE-2026-1055?: Medium severity. CVSS v3 base score is 4.4 out of 10.