A “nulled” copy (labelled Nulled 13 ) is a cracked version that strips license checks and often bundles additional, undocumented code.
The core of ArrowChat v1.8.3 is a PHP backend that stores messages in MySQL tables ( ac_messages , ac_users , etc.) and a JavaScript front‑end that polls /ajax/chat.php every few seconds. | Component | Notable changes in v1.8.3 | |-----------|--------------------------| | Database schema | Added ac_user_last_activity column; introduced ac_message_status (read/unread) | | Security | Basic CSRF token added to POST requests; however, no token validation on all endpoints | | Performance | Optimized polling interval (default 5 s) | | Bug fixes | Resolved memory leak in chat.php for >10 k concurrent users | ---- Arrowchat V1 8 3 Nulled 13
| Aspect | Observation | |--------|--------------| | | Distribution and use of nulled software violates the vendor’s EULA and copyright law. | | Security | Nulled builds frequently contain hidden back‑doors, malicious payloads, or vulnerable code that is not patched. | | Maintenance | No official updates; any discovered vulnerability will remain un‑fixed unless the site owner manually patches the code. | | Business risk | Exposure to data breaches, malware infection, loss of SEO ranking, and potential legal action. | A “nulled” copy (labelled Nulled 13 ) is
Since the release, a number of security advisories have been published (see Section 5). ArrowChat stopped providing patches for the 1.x branch in 2017. 5.1 Known Vulnerabilities (pre‑nulled) | CVE / Advisory | Issue | Impact | Mitigation (official) | |----------------|-------|--------|-----------------------| | CVE‑2016‑XXXX | Unvalidated input in chat.php → SQL Injection | Remote code execution, data exfiltration | Parameterized queries (patch released in v2.0) | | CVE‑2017‑YYYY | Improper file inclusion in loader.php | Arbitrary file read/write | Harden file path handling | | CVE‑2018‑ZZZZ | CSRF on admin/settings.php | Privilege escalation for logged‑in admins | Enforce same‑origin token | | Advisory 2019‑01 | Insecure session handling (session fixation) | Session hijacking | Regenerate session ID after login | | | Security | Nulled builds frequently contain
Prepared: 2026‑03‑26 1. Executive Summary ArrowChat is a commercial, real‑time chat & messaging add‑on for PHP‑based web platforms (e.g., WordPress, Joomla, Drupal). Version 1.8.3 was released in 2015 and is now considered end‑of‑life .