CVE-2023-2121 Vault’s KV Diff Viewer Allowed for HTML Injection

What is CVE-2023-2121?

CVE-2023-2121 is a medium-severity cross-site scripting vulnerability in Hashicorp Vault, published on 9 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Vault and Vault Enterprise's (Vault) key-value v2 (kv-v2) diff viewer allowed HTML injection into the Vault web UI through key values. This vulnerability, CVE-2023-2121, is fixed in Vault 1.14.0, 1.13.3, 1.12.7, and 1.11.11.

Weakness: CWE-79

Which versions are affected by CVE-2023-2121?

8 open source packages ship an affected version, including github.com/hashicorp/vault and vault. It affects 1 product.

Products include Hashicorp Vault.

How do I fix CVE-2023-2121?

Upgrade github.com/hashicorp/vault to a fixed version for your release line: 1.11.11, 1.12.7 or 1.13.3.

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-2023-2121 being exploited?

There is no known exploitation of CVE-2023-2121 in the wild and no public exploit code.

Other vulnerabilities in Hashicorp Vault

• CVE-2020-35192 Hardcoded credentials in n/a Critical 9.8
• CVE-2020-12757 Improper Input Validation in HashiCorp Vault Critical 9.8
• CVE-2025-6000 Arbitrary Remote Code Execution via Plugin Catalog Abuse Critical 9.1
• CVE-2022-40186 HashiCorp Vault vulnerable to incorrect metadata access Critical 9.1
• CVE-2022-36129 Missing authorization in n/a Critical 9.1

All Hashicorp Vault vulnerabilities

Sources

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

Also known as BIT-vault-2023-2121, GHSA-gq98-53rq-qr5h, GO-2023-1849.