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From c4695c78dc41d206a6c79878dea177d6188896b4 Mon Sep 17 00:00:00 2001
From: Calum Hutton <calum.hutton@snyk.io>
Date: Thu, 26 Oct 2023 12:08:53 +0100
Subject: [PATCH] xmlattr filter disallows keys with spaces
---
Jinja2-2.10.1/jinja2/filters.py | 26 +++++++++++++++++++-------
Jinja2-2.10.1/tests/test_filters.py | 6 ++++++
2 files changed, 25 insertions(+), 7 deletions(-)
diff --git a/Jinja2-2.10.1/jinja2/filters.py b/Jinja2-2.10.1/jinja2/filters.py
index 267dddd..d473058 100644
--- a/Jinja2-2.10.1/jinja2/filters.py
+++ b/Jinja2-2.10.1/jinja2/filters.py
@@ -150,11 +150,15 @@ def do_lower(s):
return soft_unicode(s).lower()
+_space_re = re.compile(r"\s", flags=re.ASCII)
+
+
@evalcontextfilter
def do_xmlattr(_eval_ctx, d, autospace=True):
"""Create an SGML/XML attribute string based on the items in a dict.
- All values that are neither `none` nor `undefined` are automatically
- escaped:
+
+ If any key contains a space, this fails with a ``ValueError``. Values that
+ are neither ``none`` nor ``undefined`` are automatically escaped.
.. sourcecode:: html+jinja
@@ -174,11 +178,19 @@ def do_xmlattr(_eval_ctx, d, autospace=True):
As you can see it automatically prepends a space in front of the item
if the filter returned something unless the second parameter is false.
"""
- rv = u' '.join(
- u'%s="%s"' % (escape(key), escape(value))
- for key, value in iteritems(d)
- if value is not None and not isinstance(value, Undefined)
- )
+ items = []
+
+ for key, value in d.items():
+ if value is None or isinstance(value, Undefined):
+ continue
+
+ if _space_re.search(key) is not None:
+ raise ValueError(f"Spaces are not allowed in attributes: '{key}'")
+
+ items.append(f'{escape(key)}="{escape(value)}"')
+
+ rv = " ".join(items)
+
if autospace and rv:
rv = u' ' + rv
if _eval_ctx.autoescape:
diff --git a/Jinja2-2.10.1/tests/test_filters.py b/Jinja2-2.10.1/tests/test_filters.py
index 8962ced..911d10a 100644
--- a/Jinja2-2.10.1/tests/test_filters.py
+++ b/Jinja2-2.10.1/tests/test_filters.py
@@ -389,6 +389,12 @@ class TestFilter(object):
assert 'bar="23"' in out
assert 'blub:blub="<?>"' in out
+ def test_xmlattr_key_with_spaces(self, env):
+ with pytest.raises(ValueError, match="Spaces are not allowed"):
+ env.from_string(
+ "{{ {'src=1 onerror=alert(1)': 'my_class'}|xmlattr }}"
+ ).render()
+
def test_sort1(self, env):
tmpl = env.from_string(
'{{ [2, 3, 1]|sort }}|{{ [2, 3, 1]|sort(true) }}')
--
2.43.0
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