CVE-2023-0488 Cross-site Scripting (XSS) - Stored in pyload/pyload

What is CVE-2023-0488?

CVE-2023-0488 is a critical cross-site scripting vulnerability in pyload/pyload, published on 26 Jan 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site Scripting (XSS) - Stored in GitHub repository pyload/pyload prior to 0.5.0b3.dev42.

Weakness: CWE-79

Which versions are affected by CVE-2023-0488?

3 open source packages ship an affected version, including pyload-ng. It affects 2 products.

Products include Pyload-Ng Project Pyload-Ng, Pyload Pyload.

How do I fix CVE-2023-0488?

Upgrade pyload-ng to 0.5.0b3.dev42 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2023-0488 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0488 exists.

Other vulnerabilities in pyload/pyload

• CVE-2025-54802 pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE) Critical 9.8
• CVE-2024-22416 Cross-Site Request Forgery on any API call in pyLoad may lead to admin privilege escalation Critical 9.7
• CVE-2026-35459 pyLoad has SSRF fix bypass via HTTP redirect Critical 9.3
• CVE-2026-35463 pyLoad has Improper Neutralization of Special Elements used in an OS Command High 8.8
• CVE-2026-33511 pyload-ng: Authentication Bypass via Host Header Injection in ClickNLoad High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wcm6-wv95-7jw6, PYSEC-2026-907.