CVE-2026-6177Network attack vector

Unauthenticated stored XSS via unescaped cached tweets

Published May 13, 2026 · Updated May 13, 2026

Stored XSS in Smash Balloon Custom Twitter Feeds 2.5.4 and earlier allows remote attackers to execute scripts through cached tweet text. CTF_Display_Elements::get_post_text() sends cached tweet data through nl2br() without HTML escaping, and ctf_get_more_posts returns the result directly. Exploitation requires attacker-controlled content to enter a configured feed's cache; requesting the unauthenticated AJAX action then executes it in a visitor's browser.

CVSS severity7.2
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Smash Balloon Custom Twitter Feeds 2.5.4 and earlier allows remote attackers to execute scripts through cached tweet text. CTF_Display_Elements::get_post_text() sends cached tweet data through nl2br() without HTML escaping, and ctf_get_more_posts returns the result directly. Exploitation requires attacker-controlled content to enter a configured feed's cache; requesting the unauthenticated AJAX action then executes it in a visitor's browser.

The record

CVE
CVE-2026-6177
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Smash Balloon
Product
Custom Twitter Feeds
Classifications
CWE-79, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Smash Balloon · Custom Twitter Feedsversion=0 <=2.5.4

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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