CVE-2023-2591 is a high-severity (CVSS 7.1) Cross-site Scripting (XSS) vulnerability in nilsteampassnet/teampass. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for nilsteampassnet/teampass — see the affected versions and patch details below.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in nilsteampassnet/teampass
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
Exploitation and automatability from CISA’s SSVC triage for CVE-2023-2591.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
nilsteampassnet/teampassReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
In nilsteampassnet/teampass prior to 3.0.7, if two users have the same folder access, malicious users can create an item where its label field is vulnerable to HTML injection. When other users see that item, it may force them to redirect to the attacker's website or capture their data using a form. The issue is fixed in version 3.0.7.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | nilsteampassnet/teampass | all versions | 3.0.7composer require nilsteampassnet/teampass:^3.0.7 |
Affected Products
teampassteampassResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nilsteampassnet/teampass, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nilsteampassnet/teampass to 3.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-2591 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2023-2591 in your dependencies?
Find it across Packagist, including transitive dependencies.