CVE-2025-62796

The record

PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Versions 1.7.7 through 2.0.1 allow persistent HTML injection via the unsanitized attachment filename (attachment_name) when attachments are enabled. An attacker can modify attachment_name before encryption so that, after decryption, arbitrary HTML is inserted unescaped into the page near the file size hint, enabling redirect (e.g., meta refresh) and site defacement and related phishing attacks. Script execution is normally blocked by the recommended Content Security Policy, limiting confidentiality impact. The issue was introduced in 1.7.7 and fixed in 2.0.2. Update to 2.0.2 or later. Workarounds include enforcing the recommended CSP, deploying PrivateBin on a separate domain, or disabling attachments.

Affected packages

Related vulnerabilities

• GHSA-867c-p784-5q6g PrivateBin is missing HTML sanitization of attached filename in file size hint Same vulnerability
• GHSA-r9x7-7ggj-fx9f PrivateBin vulnerable to malicious filename use for self-XSS / HTML injection locally for… Also affects privatebin/privatebin
• GHSA-g2j9-g8r5-rg82 PrivateBin's template-switching feature allows arbitrary local file inclusion through… Also affects privatebin/privatebin
• CVE-2025-64711 PrivateBin vulnerable to malicious filename use for self-XSS / HTML injection locally for… Also affects privatebin/privatebin
• CVE-2025-64714 PrivateBin is an online pastebin where the server has zero knowledge of pasted data. Also affects privatebin/privatebin
• CVE-2026-96379 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79
• CVE-2026-96382 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79
• CVE-2026-96368 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79