ezyang/htmlpurifier

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Standards compliant HTML filter written in PHP

Stars: 3.4k
Forks: 361
Open beginner issues: 0
Indexed issues: 105
Avg merge: 3d 41m
Merged PRs (30d): 2

Dominant language: PHP
License: LGPL-2.1
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

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105 open issues indexed

Element 'map' is not supported Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

ezyang/htmlpurifier#482 · 1 comment · Opened Apr 20, 2026
ValueError: Path cannot be empty in file_put_contents() Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

ezyang/htmlpurifier#480 · Opened Mar 12, 2026
OL reversed boolean attr Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

ezyang/htmlpurifier#468 · Opened Dec 6, 2025
Serializer not writable in vendor Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#461 · 1 comment · Opened Oct 22, 2025
Inconsistent behavior of SafeObject injector and SafeParam attributes transform Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

ezyang/htmlpurifier#459 · Opened Oct 3, 2025
Synk issues for Cross-site Scripting (XSS)-ezyang/htmlpurifier Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ezyang/htmlpurifier#450 · 1 comment · Opened Jun 17, 2025
Image width percentages in CSS Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

ezyang/htmlpurifier#448 · Opened Jun 11, 2025
CVE-2011-3744 Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ezyang/htmlpurifier#446 · 12 comments · Opened Apr 14, 2025
ExtractStyleBlocks does not support @media Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ezyang/htmlpurifier#445 · 1 comment · Opened Apr 7, 2025
How to retain an empty table row? Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

ezyang/htmlpurifier#444 · Opened Apr 5, 2025
Deleting a file that does not exist on the server Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

ezyang/htmlpurifier#442 · Opened Mar 3, 2025
Using addElement to add support for unsupported elements does not appear to be consistent Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

ezyang/htmlpurifier#435 · Opened Jan 15, 2025
body element removed Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#432 · 3 comments · Opened Jan 9, 2025
Undefined property: Illuminate\Support\Number::$required Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#431 · 4 comments · Opened Dec 18, 2024
Directory /var/www/html/vendor/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer not writable. Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ezyang/htmlpurifier#422 · 3 comments · Opened Nov 6, 2024
An error occurred when deleting the cache file Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

ezyang/htmlpurifier#418 · 1 comment · Opened Oct 9, 2024
UNC path with Backslash character don't work Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

ezyang/htmlpurifier#407 · Opened Apr 19, 2024
False postive "x<y" Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ezyang/htmlpurifier#402 · 1 comment · Opened Apr 10, 2024
website is not up to date Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

ezyang/htmlpurifier#400 · 4 comments · Opened Mar 8, 2024
Using HTML comments between nested tables nodes raises an exception Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ezyang/htmlpurifier#398 · 1 comment · Opened Mar 1, 2024
CSS pseudo class "has()" not supported Open

Difficulty 4/5 3-5 days Newbie friendliness 46/100

ezyang/htmlpurifier#397 · 1 comment · Opened Feb 29, 2024
Image alt tag not saved if user inputs it Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#394 · Opened Jan 2, 2024
How to add global attribute for all elements? Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

ezyang/htmlpurifier#392 · Opened Dec 7, 2023
Unchecked input in HTMLPurifier_UnitConverter round() function Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

ezyang/htmlpurifier#386 · 3 comments · Opened Oct 27, 2023
Deprecations for preg_match, preg_replace_callback and null argument Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#385 · Opened Sep 29, 2023
How to remove JavaScript & hyperlinks from HTML? Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

ezyang/htmlpurifier#383 · Opened Sep 9, 2023
Getting Error: Request exceeds maximum allowed text size of 50 KB Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ezyang/htmlpurifier#380 · 2 comments · Opened Jul 17, 2023
Support for conditional HTML commenting e.g. `<!--[if mso]>` Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ezyang/htmlpurifier#379 · 6 comments · 4 reactions · Opened Jul 11, 2023
URI schemas with dashes Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ezyang/htmlpurifier#378 · 2 comments · Opened Jul 10, 2023
Deprecated __autoload() method is used in HtmlPurifier.autoload.php Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

ezyang/htmlpurifier#377 · Opened Jun 16, 2023
`HTMLPurifier_ConfigSchema::makeFromSerial()` fails because `service.ser` is missing Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#376 · Opened Jun 13, 2023
Adding additional protocol handlers to URI.AllowedSchemes Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

ezyang/htmlpurifier#374 · 8 comments · 2 reactions · Opened May 16, 2023
Cache.DefinitionImpl / Cache.SerializerPath ignored Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#370 · 1 comment · 1 reaction · Opened Apr 3, 2023
Content will be cut with multiple body tags Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ezyang/htmlpurifier#362 · 1 comment · Opened Jan 23, 2023
Element 'button' is not supported (for information on implementing this, see the support forums Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

ezyang/htmlpurifier#358 · 1 comment · Opened Jan 11, 2023
Some csstidy declaration are not handle properly in ExtractStyleBlocks Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

ezyang/htmlpurifier#357 · 1 comment · Opened Jan 6, 2023
How to keep CSS variable Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#353 · Opened Nov 24, 2022
"Trying to get property 'browsable' of non-object" in HTMLPurifier_AttrTransform_* methods, because parse or getSchemeObj of HTMLPurifier_URIParser can return false Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

ezyang/htmlpurifier#343 · Opened Oct 9, 2022
Dont work Telegram, Viber href=tg:// Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#315 · 4 comments · Opened Apr 28, 2022
Lost case of text when using Core.EscapeInvalidTags Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#314 · Opened Feb 8, 2022
Excluded elements from <pre> tag Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

ezyang/htmlpurifier#312 · 2 comments · Opened Jan 24, 2022
oembed / CKeditor Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ezyang/htmlpurifier#302 · 10 comments · 1 reaction · Opened Sep 21, 2021
Selector for element with attribute is lost Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

ezyang/htmlpurifier#299 · Opened Aug 10, 2021
htmlpurifier.org website and download methods Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

ezyang/htmlpurifier#296 · 3 comments · Opened Jul 15, 2021
linkify Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ezyang/htmlpurifier#294 · Opened Jun 5, 2021
Undefined property: DOMAttr::$name Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

ezyang/htmlpurifier#291 · 2 comments · Opened May 19, 2021
"a" anchor wrapping a table gives wrong result Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ezyang/htmlpurifier#284 · 1 comment · Opened Feb 12, 2021
How to set global attributes like microdata Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ezyang/htmlpurifier#277 · 10 comments · 2 reactions · Opened Oct 19, 2020
Allow `data-*` attributes Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

ezyang/htmlpurifier#276 · 7 comments · Opened Oct 10, 2020
deprecated get_magic_quotes_gpc Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

ezyang/htmlpurifier#275 · 1 comment · Opened Oct 5, 2020

ezyang/htmlpurifier

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