Vulnerability · Published Oct 28, 2025 · Assigned by GitHub_M
CVE-2025-62796PrivateBin persistent HTML injection in attachment filename enables redirect and defacement
Medium 5.8
In plain English
A medium-severity cross-site scripting in PrivateBin from PrivateBin. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | privatebin/privatebin | 2.0.2 | GHSA-867c-p784-5q6g |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PrivateBin | PrivateBin | >= 1.7.7, < 2.0.2 |
Weakness: CWE-79, CWE-80 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N