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MEDIUM severity

CVE-2015-1864 — kallithea

MEDIUM

CVE-2015-1864 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in kallithea. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for kallithea — see the affected versions and patch details below.

Kallithea cross-site scripting (XSS) vulnerability

Also known asPYSEC-2017-17
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
2 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.00%0.48%0.97%1.45%0.4%1.0%May 26Sep 26Nov 26

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

1 pkg affected
🐍kallithea

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Multiple cross-site scripting (XSS) vulnerabilities in the administration pages in Kallithea before 0.2.1 allow remote attackers to inject arbitrary web script or HTML via the (1) first name or (2) last name user details, or the (3) repository, (4) repository group, or (5) user group description.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIkallitheaall versions0.2.1pip install --upgrade 'kallithea==0.2.1'

Affected Products

1 product · 2 configurations
Application
kallitheakallithea-scm
2 versions
0.10.2
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Multiple cross-site scripting (XSS) vulnerabilities in the administratio…

kallithea-scm.orgNVDMay 2020

Report on openwall.com

openwall.comNVDMay 2020

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for kallithea, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update kallithea to 0.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-1864 is resolved across your whole dependency graph.

  3. 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

Multiple cross-site scripting (XSS) vulnerabilities in the administration pages in Kallithea before 0.2.1 allow remote attackers to inject arbitrary web script or HTML via the (1) first name or (2) last name user details, or the (3) repository, (4) repository group, or (5) user group description.
O3 Security · Impact-Aware SCA

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CVE-2015-1864: kallithea XSS — Fixed in 0.2.1