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A newly discovered vulnerability, similar to the CVE-2024-7014 flaw, has been found in the Telegram messaging app, allowing attackers to run malicious code on Android devices. Discovered on March 4, 2025, the exploit involves disguising an HTML file as a video, which, when sent through Telegram’s API, can trick users into inadvertently executing JavaScript code. This poses a serious security threat to Android users, highlighting the ongoing battle between security researchers and malicious actors.
the Exploit
A recent vulnerability in Telegram allows attackers to send disguised HTML files as video files, which users may mistakenly open, triggering malicious JavaScript code. This flaw exploits how Telegram handles file extensions and MIME types. When a file with an “.htm” extension is sent with a video MIME type, Telegram treats it as a legitimate video. When a user opens the file, it redirects to a browser or opens the HTML file directly.
By exploiting this method, attackers can execute JavaScript code, which could lead to various malicious actions, such as stealing user data. This specific exploit uses the “content://” URI scheme, targeting a specific Android path that bypasses security protocols. One example demonstrated how the exploit could trigger an IP logger, capturing and sending the victim’s IP information to an attacker’s server.
Researchers have already developed a proof-of-concept script that automates this attack, using the Telegram Bot API to distribute the malicious payload. While similar to the CVE-2024-7014 vulnerability, this new exploit shows how attackers continue to evolve their tactics. Users are advised to be cautious when opening files from unknown sources, particularly videos, and to keep their apps and operating systems updated.
What Undercode Says: Understanding the Risks and Mitigating Them
The emergence of this exploit illustrates the ever-evolving nature of cybersecurity threats, as attackers continue to leverage seemingly benign features of widely used platforms for malicious purposes. The vulnerability itself is not entirely new, as it builds upon known techniques like the CVE-2024-7014 vulnerability, which targeted Telegram and led to the spread of malware via a similar method. However, this version showcases a sophisticated approach where attackers take advantage of Telegram’s handling of file types and extensions.
At the heart of this exploit is
The malicious HTML file, when opened, triggers a browser or external app to launch, where it can execute JavaScript code. This, in turn, could initiate a variety of harmful actions, such as tracking user activity, stealing sensitive data, or even deploying malware. In the case of the demonstration script, attackers could use it to send a victim’s IP address to a remote server, giving them valuable insights into the victim’s location and identity. Although this may seem like a small-scale attack, it could be a precursor to more significant security breaches, depending on the goals of the attacker.
The fact that this exploit leverages the “content://” URI scheme on Android is also particularly concerning. This scheme is often used by Android apps to access shared data across applications, which makes it a powerful vector for attackers to bypass restrictions that would normally block such actions. By exploiting this, attackers can inject malicious code that executes without the user’s consent, adding an extra layer of complexity to the attack.
As of now, it is unclear whether Telegram is aware of the specific exploit and whether a patch is in development. However, this incident serves as a stark reminder of the importance of continuous monitoring and updating of apps and devices. Telegram, like other popular platforms, must stay vigilant in its efforts to protect users, especially considering the widespread use of the app across the globe.
For users, the best defense against such threats is caution. Avoid opening suspicious video files or any other unexpected attachments, particularly those that redirect to external apps or browsers. Keeping your Telegram app updated and ensuring that your Android operating system is patched with the latest security updates can help mitigate the risks associated with such vulnerabilities.
This exploit also highlights the arms race between attackers and defenders. As long as platforms continue to allow the handling of unverified file types, malicious actors will continue to discover new ways to exploit them. The solution lies in rigorous security testing, improved file handling protocols, and faster patching processes. As security researchers continue to uncover these threats, users must remain proactive in safeguarding their devices.
Fact Checker Results:
- Validity of the Vulnerability: The exploit has been confirmed by multiple cybersecurity researchers, indicating it is a valid and active threat.
- Exploit Method: The described method using MIME type mismatches and the “content://” URI scheme is consistent with known attack patterns targeting Android apps.
- Telegram’s Response: As of the latest information, there is no official statement from Telegram regarding this specific exploit, though users are advised to stay updated on any potential patches.
References:
Reported By: https://cyberpress.org/telegram-evilvideo-vulnerability-used/
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