CVE-2026-1055 json
TalkJS <= 0.1.15 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'welcomeMessage' Parameter
published 2026-02-19 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-7560
- cvss
- 4.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 14%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.4 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N |
Affected products
- talkjs TalkJS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/f91ed211-9703-44fb-a2f8-8d8da910b4c7?source=cve
- plugins.trac.wordpress.org /browser/talkjs/trunk/classes/admin/ui/SettingsPage.php#L276
- plugins.trac.wordpress.org /browser/talkjs/tags/0.1.15/classes/admin/ui/SettingsPage.php#L276
- plugins.trac.wordpress.org /browser/talkjs/trunk/classes/admin/ui/FieldBuilder.php#L147
- plugins.trac.wordpress.org /browser/talkjs/tags/0.1.15/classes/admin/ui/FieldBuilder.php#L147
- plugins.trac.wordpress.org /changeset/3465226/
Sources
- CVE List CVE-2026-1055
- NVD CVE-2026-1055
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.