CVE-2021-29625 XSS in doc_link
Cross-site scripting in Adminer allows attackers to execute scripts in victim browsers when using PDO extensions without strict CSP.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-29625?
CVE-2021-29625 is a high-severity cross-site scripting vulnerability in vrana adminer, published on 19 May 2021. 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
Adminer is open-source database management software. A cross-site scripting vulnerability in Adminer versions 4.6.1 to 4.8.0 affects users of MySQL, MariaDB, PgSQL and SQLite. XSS is in most cases prevented by strict CSP in all modern browsers. The only exception is when Adminer is using a `pdo_` extension to communicate with the database (it is used if the native extensions are not enabled). In browsers without CSP, Adminer versions 4.6.1 to 4.8.0 are affected. The vulnerability is patched in version 4.8.1. As workarounds, one can use a browser supporting strict CSP or enable the native PHP extensions (e.g. `mysqli`) or disable displaying PHP errors (`display_errors`).
Weakness: CWE-79
Which versions are affected by CVE-2021-29625?
2 open source packages ship an affected version, including vrana/adminer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vrana/adminer Packagist | From 4.7.8 | 4.8.1 |
vrana/adminer Packagist | From 4.7.8 | 4.8.1 |
Products include Adminer Adminer.
How do I fix CVE-2021-29625?
Upgrade vrana/adminer to 4.8.1 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-2021-29625 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-29625 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in vrana adminer
- CVE-2021-21311 Adminer Server-Side Request Forgery
- CVE-2018-7667 vrana/adminer vulnerable to SSRF by connecting to privileged ports
- CVE-2025-43960 Adminer PHP Object Injection issue leads to Denial of Service
- CVE-2026-25892 Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint
- CVE-2021-43008 Files or Directories Accessible to External Parties in Adminer
Sources
Also known as DEBIAN-CVE-2021-29625, GHSA-2v82-5746-vwqc, UBUNTU-CVE-2021-29625.