Cross-Site Scripting (XSS) in slippers (CVE-2026-34231)
Summary
Cross-site scripting in slippers (CVE-2026-34231). Risk of unauthorized operations or information disclosure. Exploitable via slippers. Mitigation: upgrade to 0.6.3 or later.
Original description
The description as published by the source.
Summary
A Cross-site Scripting (XSS) vulnerability exists in the {% attrs %} template tag of the slippers Django package. When a context variable containing untrusted data is passed to {% attrs %}, the value is interpolated into an HTML attribute string without escaping, allowing an attacker to break out of the attribute context and inject arbitrary HTML or JavaScript into the rendered page.
Vulnerability details
Root cause
AttrsNode is a custom Node subclass registered via register.tag(). Unlike register.simple_tag(), which automatically applies conditional_escape() when autoescape is on, custom Node.render() methods receive no automatic escaping and are fully responsible for sanitising their output. attr_string() fails to do this:
def attr_string(key: str, value: Any):
if isinstance(value, bool):
return key if value else ""
key = key.replace("_", "-")
return f'{key}="{value}"' # value is not escaped
Attack scenario
Given a template that uses {% attrs %} with a user-supplied value:
{% load slippers %}
render(request, "search.html", {"placeholder": request.GET.get("q", "")})
An attacker crafting a request with q=" onmouseover="alert(document.cookie)" x=" produces:
Impact
Any template that passes values derived from user input, database content, or other untrusted sources to {% attrs %} is vulnerable. Successful exploitation can lead to session…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-34231 has been found in slippers.
Attackers can target a specific entry point like slippers over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.1/10.
What to do: upgrade slippers to 0.6.3 or later.
If unsure, ask your IT team or search "slippers CVE-2026-34231" on the vendor's site.
CVE-2026-34231 (slippers) — CWE-79 / CVSS v3 6.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: slippers / AttrsNode / Node
Patched: 0.6.3 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in slippers. Attackers reach the vulnerable code path via slippers without authentication.
Check the vendor advisory for the affected versions of slippers. Attack surface: slippers / AttrsNode / Node.
Severity: Medium (CVSS 6.1/10). Risk of unauthorized operations or information disclosure.
Update to 0.6.3.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'slippers' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'slippers' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
slippersを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade slippers to 0.6.3ステージング環境で 0.6.3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com