CMS HTML validator missing H6 tag

[adamlavery]

Preconditions and environment

OS 2.4.3-p1

Steps to reproduce

1. Add CMS block (Content - Blocks - Add new Block)
2. Edit with page builder - Drag Row
3. Elements - Drag Heading
4. Add H6 tag and save

Expected result

Block should be saved without warnings.

Actual result

Results in "Temporarily allowed to save HTML value that contains restricted elements".

Additional information

H6 tag has been omitted from valid tags, only H1-5 are included.

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @adamlavery. Thank you for your report.
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[adamlavery]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @adamlavery. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @adamlavery, here is your Magento Instance: https://0e3af2ce7a291b7db8881e668e9b4613.instances.magento-community.engineering
Admin access: https://0e3af2ce7a291b7db8881e668e9b4613.instances.magento-community.engineering/admin_f142
Login: 1de392c2
Password: ef89d699d9ac

[adamlavery]

Confirmed present in 2.4-develop

[adamlavery]

vendor\magento\module-cms\etc\di.xml:

    <virtualType name="DefaultWYSIWYGValidator" type="Magento\Framework\Validator\HTML\ConfigurableWYSIWYGValidator">
        <arguments>
            <argument name="allowedTags" xsi:type="array">
                <item name="div" xsi:type="string">div</item>
                <item name="a" xsi:type="string">a</item>
                <item name="p" xsi:type="string">p</item>
                <item name="span" xsi:type="string">span</item>
                <item name="em" xsi:type="string">em</item>
                <item name="strong" xsi:type="string">strong</item>
                <item name="ul" xsi:type="string">ul</item>
                <item name="li" xsi:type="string">li</item>
                <item name="ol" xsi:type="string">ol</item>
                <item name="h5" xsi:type="string">h5</item>
                <item name="h4" xsi:type="string">h4</item>
                <item name="h3" xsi:type="string">h3</item>
                <item name="h2" xsi:type="string">h2</item>
                <item name="h1" xsi:type="string">h1</item>
                <item name="table" xsi:type="string">table</item>
                <item name="tbody" xsi:type="string">tbody</item>
                <item name="tr" xsi:type="string">tr</item>
                <item name="td" xsi:type="string">td</item>
                <item name="th" xsi:type="string">th</item>
                <item name="tfoot" xsi:type="string">tfoot</item>
                <item name="img" xsi:type="string">img</item>
                <item name="hr" xsi:type="string">hr</item>
                <item name="figure" xsi:type="string">figure</item>
                <item name="button" xsi:type="string">button</item>
                <item name="i" xsi:type="string">i</item>
                <item name="u" xsi:type="string">u</item>
                <item name="br" xsi:type="string">br</item>
                <item name="b" xsi:type="string">b</item>
            </argument>

[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
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[engcom-November]

@magento give me 2.4-develop instance with edition ee

[magento-deployment-service]

Hi @engcom-November. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @engcom-November, here is your Magento Instance: https://0e3af2ce7a291b7db8881e668e9b4613.instances.magento-community.engineering
Admin access: https://0e3af2ce7a291b7db8881e668e9b4613.instances.magento-community.engineering/admin_0841
Login: 7730ce48
Password: 28adfecc85c9

[engcom-November]

We are confirming this issue as its reproducible on 2.4-develop instance. User is able to save the block but below warning message is displayed which is conflicting with Magento documentation. H6 is a supported tag mentioned in magento docs but still warning message displayed where H6 tag is not mentioned in supported tags listing.