CVE-2026-84909 json
Custom Twitter Feeds <= 2.8.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute
published 2026-09-18 52 d ago modified 2026-09-18 52 d ago also EUVD-2026-82731
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
The Custom Twitter Feeds – A Tweets Widget or X Feed Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute in all versions up to, and including, 2.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is exploitable on common installs where the admin has configured access tokens with zero or multiple legacy feeds, as this causes the ctf_statuses support_legacy_shortcode option to be set to boolean true by default, activating the unfiltered legacy shortcode attribute code path.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 52 d ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- smub Custom Twitter Feeds – A Tweets Widget or X Feed Widget
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/b1a9d042-c0c0-477a-8cdf-9fb9d2239059?source=cve
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2338
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Parse.php#L551
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2001
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Settings.php#L293
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Settings.php#L234
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L139
- plugins.trac.wordpress.org /browser/custom-twitter-feeds/tags/2.8.0/custom-twitter-feed.php#L432
- plugins.trac.wordpress.org /changeset?reponame=&new=3695675%40custom-twitter-feeds&old=3665650%40custom-twitter-feeds
Sources
- CVE List CVE-2026-84909
- NVD CVE-2026-84909
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