CVE-2019-13633
Description
Blinger.io v.1.0.2519 is vulnerable to Blind/Persistent XSS. An attacker can send arbitrary JavaScript code via a built-in communication channel, such as Telegram, WhatsApp, Viber, Skype, Facebook, Vkontakte, or Odnoklassniki. This is mishandled within the administration panel for conversations/all, conversations/inbox, conversations/unassigned, and conversations/closed.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Blinger.io v1.0.2519 suffers from blind/persistent XSS via built-in messaging channels, allowing arbitrary JavaScript execution in the admin panel.
Vulnerability
Blinger.io v1.0.2519 is vulnerable to blind/persistent cross-site scripting (XSS). An attacker can inject arbitrary JavaScript code through the platform's built-in communication channels, including Telegram, WhatsApp, Viber, Skype, and others. The injected code is stored and later executed within the administration panel at the paths conversations/all, conversations/inbox, conversations/unassigned, and conversations/closed. The vulnerability was confirmed by the vendor [1][2].
Exploitation
An attacker does not require authentication to the admin panel; they only need the ability to send a message via one of the integrated messaging services. By crafting a message containing malicious JavaScript, the attacker delivers the payload through the customer-facing communication widget. When a help desk operator views the message in the admin panel, the script executes in the context of the admin session, requiring no user interaction beyond normal message review [1][2].
Impact
Successful exploitation leads to information disclosure and further compromise. The attacker can steal session cookies, perform phishing attacks within the admin interface, or gather critical information about the target company's clients. Because the XSS is persistent, the malicious script executes each time the affected panel is loaded, enabling ongoing data exfiltration. The attack can serve as a foundation for many other attack vectors [1][2].
Mitigation
No official patch has been released by the vendor. The vendor confirmed the vulnerability but did not provide a fixed version in the available references. Users are advised to monitor the Blinger.io changelog (https://help.blinger.io/changelog) for updates [1][2].
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2- Blinger.io/Blinger.iodescription
- Range: = 1.0.2519
Patches
0No patches discovered yet.
Vulnerability mechanics
Root cause
"Missing output sanitization of user-supplied message content from integrated communication channels allows arbitrary JavaScript to execute in the administration panel."
Attack vector
An attacker sends arbitrary JavaScript code through a built-in communication channel (Telegram, WhatsApp, Viber, Skype, Facebook, Vkontakte, or Odnoklassniki) that is embedded in the customer-facing web page [ref_id=1]. The transmitted JavaScript is not sanitized before being rendered in the helpdesk administration panel, so when a support agent views conversations in the affected panels, the script executes in the agent's browser [ref_id=1]. This allows the attacker to steal session cookies, perform phishing attacks, or gather information about the targeted company's clients [ref_id=1]. The attack is remote and requires no special network position beyond the ability to send messages via the integrated channels [ref_id=1].
Affected code
The vulnerability affects the administration panel at the paths /conversations/all, /conversations/inbox, /conversations/unassigned, and /conversations/closed on app.blinger.io [ref_id=1]. The product is Blinger Omnichannel helpdesk v.1.0.2519 [ref_id=1]. No specific source file or function is identified in the advisory.
What the fix does
The advisory states that the vendor confirmed the vulnerability but no patch or remediation details are published in the reference material [ref_id=1]. The vendor's changelog at https://help.blinger.io/changelog is referenced but its contents are not included in the bundle [ref_id=1]. Without a patch diff or vendor advisory text, the specific fix cannot be described; the expected remediation would be to sanitize or encode user-supplied message content before rendering it in the administration panel.
Preconditions
- inputThe attacker must be able to send a message via one of the integrated communication channels (Telegram, WhatsApp, Viber, Skype, Facebook, Vkontakte, or Odnoklassniki) that the Blinger platform ingests.
- inputA support agent must view the attacker's message in one of the affected administration panels (conversations/all, conversations/inbox, conversations/unassigned, or conversations/closed).
Reproduction
The advisory references a proof of concept showing execution of malicious code reflected in xsshunter.com but does not include the full reproduction steps or payload [ref_id=1]. No public exploit/PoC references beyond the advisory text are provided in the bundle.
Generated on May 25, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
1- blinger.iomitrex_refsource_MISC
News mentions
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