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Code Issues Releases Wiki Activity

Escape unescaped " in attribute values

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Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1923
This commit is contained in:
Raymond Hill 2022-01-11 07:20:03 -05:00
parent 82ad7bd4fb
commit 6941ec7fb0
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1 changed files with 7 additions and 3 deletions
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10
src/js/scriptlets/epicker.js
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@ -416,6 +416,9 @@ const cosmeticFilterFromElement = function(elem) {
// Use attributes if still no selector found.
// https://github.com/gorhill/uBlock/issues/1901
// Trim attribute value, this may help in case of malformed HTML.
//
// https://github.com/uBlockOrigin/uBlock-issues/issues/1923
// Escape unescaped `"` in attribute values
if ( selector === '' ) {
let attributes = [], attr;
switch ( tagName ) {
@ -457,13 +460,14 @@ const cosmeticFilterFromElement = function(elem) {
}
while ( (attr = attributes.pop()) ) {
if ( attr.v.length === 0 ) { continue; }
const w = attr.v.replace(/([^\\])"/g, '$1\\"');
v = elem.getAttribute(attr.k);
if ( attr.v === v ) {
selector += `[${attr.k}="${attr.v}"]`;
selector += `[${attr.k}="${w}"]`;
} else if ( v.startsWith(attr.v) ) {
selector += `[${attr.k}^="${attr.v}"]`;
selector += `[${attr.k}^="${w}"]`;
} else {
selector += `[${attr.k}*="${attr.v}"]`;
selector += `[${attr.k}*="${w}"]`;
}
}
}