TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes
The advisory, in context
Impact
Stored XSS vulnerability via unsanitized data-mce-* attributes (data-mce-href, data-mce-src, data-mce-style). Allows attackers to inject malicious values that override safe attributes during serialization, bypassing validation.
Patches
Patched by stripping unsafe data-mce-* attributes during parsing. Users should upgrade to the latest patched versions (5 LTS, 7.x, 8.x).
Workarounds
No official workaround available.
Fix
To avoid this vulnerability:
Upgrade to TinyMCE 8.5.1 or higher. Upgrade to TinyMCE 7.9.3 or higher. Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract).
Acknowledgements
Tiny thanks Tadi Kadango (website) and Ivan Babenko for their help identifying this vulnerability.
Affected packages
Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.
Earlier releases through 5.10.9 (inclusive)
No fix recorded for this interval.
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
],
"type": "SEMVER"
}
],
"versions": []
}From 6.0.0 before 7.9.3
Fixed in 7.9.3
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
],
"type": "SEMVER"
}
],
"versions": []
}From 8.0.0 before 8.5.1
Fixed in 8.5.1
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
],
"type": "SEMVER"
}
],
"versions": []
}Earlier releases through 5.10.9 (inclusive)
No fix recorded for this interval.
182 explicitly affected versions
3.4.3.2, 3.4.4, 3.4.5, 3.4.7, 3.5.0, 3.5.0.1, 3.5.1, 3.5.1.1, 3.5.2, 3.5.3, 3.5.4, 3.5.4.1, 3.5.5, 3.5.6, 3.5.7, 3.5.8, 4.0.0, 4.0.1, 4.0.10, 4.0.11, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.17, 4.0.18, 4.0.19, 4.0.2, 4.0.20, 4.0.21, 4.0.22, 4.0.23, 4.0.24, 4.0.25, 4.0.26, 4.0.27, 4.0.28, 4.0.4, 4.0.5, 4.0.6, 4.0.8, 4.0.9, 4.1.0, 4.1.1, 4.1.10, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.1.6, 4.1.7, 4.1.8, 4.1.9, 4.2.0, 4.2.1, 4.2.2, 4.2.3, 4.2.4, 4.2.5, 4.2.6, 4.2.7, 4.2.8, 4.3.0, 4.3.1, 4.3.10, 4.3.11, 4.3.12, 4.3.13, 4.3.2, 4.3.3, 4.3.4, 4.3.6, 4.3.7, 4.3.8, 4.3.9, 4.4.0, 4.4.1, 4.4.2, 4.4.3, 4.5.0, 4.5.1, 4.5.2, 4.5.3, 4.5.4, 4.5.5, 4.5.6, 4.5.7, 4.5.8, 4.6.0, 4.6.1, 4.6.2, 4.6.3, 4.6.4, 4.6.5, 4.6.6, 4.6.7, 4.7.0, 4.7.10, 4.7.11, 4.7.12, 4.7.13, 4.7.3, 4.7.4, 4.7.5, 4.7.6, 4.7.7, 4.7.8, 4.7.9, 4.8.0, 4.8.1, 4.8.2, 4.8.3, 4.8.4, 4.8.5, 4.9.0, 4.9.1, 4.9.10, 4.9.11, 4.9.2, 4.9.3, 4.9.4, 4.9.5, 4.9.6, 4.9.7, 4.9.8, 4.9.9, 5.0.0, 5.0.1, 5.0.10, 5.0.11, 5.0.12, 5.0.13, 5.0.14, 5.0.15, 5.0.16, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.6, 5.10.0, 5.10.1, 5.10.2, 5.10.3, 5.10.4, 5.10.5, 5.10.6, 5.10.7, 5.10.8, 5.10.9, 5.2.0, 5.2.1, 5.2.2, 5.3.0, 5.3.1, 5.3.2, 5.4.0, 5.4.1, 5.4.2, 5.5.0, 5.5.1, 5.6.0, 5.6.1, 5.6.2, 5.7.0, 5.7.1, 5.8.0, 5.8.1, 5.8.2, 5.9.0, 5.9.1, 5.9.2
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.3.2",
"3.4.4",
"3.4.5",
"3.4.7",
"3.5.0",
"3.5.0.1",
"3.5.1",
"3.5.1.1",
"3.5.2",
"3.5.3",
"3.5.4",
"3.5.4.1",
"3.5.5",
"3.5.6",
"3.5.7",
"3.5.8",
"4.0.0",
"4.0.1",
"4.0.10",
"4.0.11",
"4.0.13",
"4.0.14",
"4.0.15",
"4.0.16",
"4.0.17",
"4.0.18",
"4.0.19",
"4.0.2",
"4.0.20",
"4.0.21",
"4.0.22",
"4.0.23",
"4.0.24",
"4.0.25",
"4.0.26",
"4.0.27",
"4.0.28",
"4.0.4",
"4.0.5",
"4.0.6",
"4.0.8",
"4.0.9",
"4.1.0",
"4.1.1",
"4.1.10",
"4.1.2",
"4.1.3",
"4.1.4",
"4.1.5",
"4.1.6",
"4.1.7",
"4.1.8",
"4.1.9",
"4.2.0",
"4.2.1",
"4.2.2",
"4.2.3",
"4.2.4",
"4.2.5",
"4.2.6",
"4.2.7",
"4.2.8",
"4.3.0",
"4.3.1",
"4.3.10",
"4.3.11",
"4.3.12",
"4.3.13",
"4.3.2",
"4.3.3",
"4.3.4",
"4.3.6",
"4.3.7",
"4.3.8",
"4.3.9",
"4.4.0",
"4.4.1",
"4.4.2",
"4.4.3",
"4.5.0",
"4.5.1",
"4.5.2",
"4.5.3",
"4.5.4",
"4.5.5",
"4.5.6",
"4.5.7",
"4.5.8",
"4.6.0",
"4.6.1",
"4.6.2",
"4.6.3",
"4.6.4",
"4.6.5",
"4.6.6",
"4.6.7",
"4.7.0",
"4.7.10",
"4.7.11",
"4.7.12",
"4.7.13",
"4.7.3",
"4.7.4",
"4.7.5",
"4.7.6",
"4.7.7",
"4.7.8",
"4.7.9",
"4.8.0",
"4.8.1",
"4.8.2",
"4.8.3",
"4.8.4",
"4.8.5",
"4.9.0",
"4.9.1",
"4.9.10",
"4.9.11",
"4.9.2",
"4.9.3",
"4.9.4",
"4.9.5",
"4.9.6",
"4.9.7",
"4.9.8",
"4.9.9",
"5.0.0",
"5.0.1",
"5.0.10",
"5.0.11",
"5.0.12",
"5.0.13",
"5.0.14",
"5.0.15",
"5.0.16",
"5.0.2",
"5.0.3",
"5.0.4",
"5.0.5",
"5.0.6",
"5.0.7",
"5.0.8",
"5.0.9",
"5.1.0",
"5.1.1",
"5.1.2",
"5.1.3",
"5.1.4",
"5.1.5",
"5.1.6",
"5.10.0",
"5.10.1",
"5.10.2",
"5.10.3",
"5.10.4",
"5.10.5",
"5.10.6",
"5.10.7",
"5.10.8",
"5.10.9",
"5.2.0",
"5.2.1",
"5.2.2",
"5.3.0",
"5.3.1",
"5.3.2",
"5.4.0",
"5.4.1",
"5.4.2",
"5.5.0",
"5.5.1",
"5.6.0",
"5.6.1",
"5.6.2",
"5.7.0",
"5.7.1",
"5.8.0",
"5.8.1",
"5.8.2",
"5.9.0",
"5.9.1",
"5.9.2"
]
}From 6.0.0 before 7.9.3
Fixed in 7.9.3
49 explicitly affected versions
6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.1.0, 6.1.1, 6.1.2, 6.2.0, 6.3.0, 6.3.1, 6.3.2, 6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1, 6.6.2, 6.7.0, 6.7.1, 6.7.2, 6.7.3, 6.8.0, 6.8.1, 6.8.2, 6.8.3, 6.8.4, 6.8.5, 6.8.6, 7.0.0, 7.0.1, 7.1.0, 7.1.1, 7.1.2, 7.2.0, 7.2.1, 7.3.0, 7.4.0, 7.4.1, 7.5.0, 7.5.1, 7.6.0, 7.6.1, 7.7.0, 7.7.1, 7.7.2, 7.8.0, 7.9.0, 7.9.1, 7.9.2
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
],
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],
"versions": [
"6.0.0",
"6.0.1",
"6.0.2",
"6.0.3",
"6.1.0",
"6.1.1",
"6.1.2",
"6.2.0",
"6.3.0",
"6.3.1",
"6.3.2",
"6.4.0",
"6.4.1",
"6.4.2",
"6.5.0",
"6.5.1",
"6.6.2",
"6.7.0",
"6.7.1",
"6.7.2",
"6.7.3",
"6.8.0",
"6.8.1",
"6.8.2",
"6.8.3",
"6.8.4",
"6.8.5",
"6.8.6",
"7.0.0",
"7.0.1",
"7.1.0",
"7.1.1",
"7.1.2",
"7.2.0",
"7.2.1",
"7.3.0",
"7.4.0",
"7.4.1",
"7.5.0",
"7.5.1",
"7.6.0",
"7.6.1",
"7.7.0",
"7.7.1",
"7.7.2",
"7.8.0",
"7.9.0",
"7.9.1",
"7.9.2"
]
}From 8.0.0 before 8.5.1
Fixed in 8.5.1
14 explicitly affected versions
8.0.0, 8.0.1, 8.0.2, 8.1.0, 8.1.1, 8.1.2, 8.2.0, 8.2.1, 8.2.2, 8.3.0, 8.3.1, 8.3.2, 8.4.0, 8.5.0
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.0",
"8.0.1",
"8.0.2",
"8.1.0",
"8.1.1",
"8.1.2",
"8.2.0",
"8.2.1",
"8.2.2",
"8.3.0",
"8.3.1",
"8.3.2",
"8.4.0",
"8.5.0"
]
}Earlier releases through 5.10.9 (inclusive)
No fix recorded for this interval.
173 explicitly affected versions
4.0.0, 4.0.1, 4.0.10, 4.0.11, 4.0.12, 4.0.13, 4.0.14, 4.0.15, 4.0.16, 4.0.17, 4.0.18, 4.0.19, 4.0.2, 4.0.20, 4.0.21, 4.0.22, 4.0.23, 4.0.24, 4.0.25, 4.0.26, 4.0.27, 4.0.28, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 4.0.8, 4.0.9, 4.1.0, 4.1.1, 4.1.10, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.1.6, 4.1.7, 4.1.8, 4.1.9, 4.2.0, 4.2.1, 4.2.2, 4.2.3, 4.2.4, 4.2.5, 4.2.6, 4.2.7, 4.2.8, 4.3.0, 4.3.1, 4.3.10, 4.3.11, 4.3.12, 4.3.13, 4.3.2, 4.3.3, 4.3.4, 4.3.6, 4.3.7, 4.3.8, 4.3.9, 4.4.0, 4.4.1, 4.4.2, 4.4.3, 4.5.0, 4.5.1, 4.5.12, 4.5.2, 4.5.3, 4.5.4, 4.5.5, 4.5.6, 4.5.7, 4.5.8, 4.5.9, 4.6.0, 4.6.1, 4.6.2, 4.6.3, 4.6.4, 4.6.5, 4.6.6, 4.6.7, 4.7.0, 4.7.1, 4.7.10, 4.7.11, 4.7.12, 4.7.13, 4.7.2, 4.7.3, 4.7.4, 4.7.5, 4.7.6, 4.7.7, 4.7.8, 4.7.9, 4.8.0, 4.8.1, 4.8.2, 4.8.3, 4.8.4, 4.8.5, 4.9.0, 4.9.1, 4.9.10, 4.9.11, 4.9.2, 4.9.3, 4.9.4, 4.9.5, 4.9.6, 4.9.7, 4.9.8, 4.9.9, 5.0.0, 5.0.1, 5.0.10, 5.0.11, 5.0.12, 5.0.13, 5.0.14, 5.0.15, 5.0.16, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.6, 5.10.0, 5.10.1, 5.10.2, 5.10.3, 5.10.4, 5.10.5, 5.10.6, 5.10.7, 5.10.8, 5.10.9, 5.2.0, 5.2.1, 5.2.2, 5.3.0, 5.3.1, 5.3.2, 5.4.0, 5.4.1, 5.4.2, 5.5.0, 5.5.1, 5.6.0, 5.6.1, 5.6.2, 5.7.0, 5.7.1, 5.8.0, 5.8.1, 5.8.2, 5.9.0, 5.9.1, 5.9.2
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.10.9"
}
],
"type": "ECOSYSTEM"
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],
"versions": [
"4.0.0",
"4.0.1",
"4.0.10",
"4.0.11",
"4.0.12",
"4.0.13",
"4.0.14",
"4.0.15",
"4.0.16",
"4.0.17",
"4.0.18",
"4.0.19",
"4.0.2",
"4.0.20",
"4.0.21",
"4.0.22",
"4.0.23",
"4.0.24",
"4.0.25",
"4.0.26",
"4.0.27",
"4.0.28",
"4.0.3",
"4.0.4",
"4.0.5",
"4.0.6",
"4.0.7",
"4.0.8",
"4.0.9",
"4.1.0",
"4.1.1",
"4.1.10",
"4.1.2",
"4.1.3",
"4.1.4",
"4.1.5",
"4.1.6",
"4.1.7",
"4.1.8",
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"4.2.0",
"4.2.1",
"4.2.2",
"4.2.3",
"4.2.4",
"4.2.5",
"4.2.6",
"4.2.7",
"4.2.8",
"4.3.0",
"4.3.1",
"4.3.10",
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"4.3.12",
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"4.3.2",
"4.3.3",
"4.3.4",
"4.3.6",
"4.3.7",
"4.3.8",
"4.3.9",
"4.4.0",
"4.4.1",
"4.4.2",
"4.4.3",
"4.5.0",
"4.5.1",
"4.5.12",
"4.5.2",
"4.5.3",
"4.5.4",
"4.5.5",
"4.5.6",
"4.5.7",
"4.5.8",
"4.5.9",
"4.6.0",
"4.6.1",
"4.6.2",
"4.6.3",
"4.6.4",
"4.6.5",
"4.6.6",
"4.6.7",
"4.7.0",
"4.7.1",
"4.7.10",
"4.7.11",
"4.7.12",
"4.7.13",
"4.7.2",
"4.7.3",
"4.7.4",
"4.7.5",
"4.7.6",
"4.7.7",
"4.7.8",
"4.7.9",
"4.8.0",
"4.8.1",
"4.8.2",
"4.8.3",
"4.8.4",
"4.8.5",
"4.9.0",
"4.9.1",
"4.9.10",
"4.9.11",
"4.9.2",
"4.9.3",
"4.9.4",
"4.9.5",
"4.9.6",
"4.9.7",
"4.9.8",
"4.9.9",
"5.0.0",
"5.0.1",
"5.0.10",
"5.0.11",
"5.0.12",
"5.0.13",
"5.0.14",
"5.0.15",
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"5.0.2",
"5.0.3",
"5.0.4",
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"5.0.6",
"5.0.7",
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"5.0.9",
"5.1.0",
"5.1.1",
"5.1.2",
"5.1.3",
"5.1.4",
"5.1.5",
"5.1.6",
"5.10.0",
"5.10.1",
"5.10.2",
"5.10.3",
"5.10.4",
"5.10.5",
"5.10.6",
"5.10.7",
"5.10.8",
"5.10.9",
"5.2.0",
"5.2.1",
"5.2.2",
"5.3.0",
"5.3.1",
"5.3.2",
"5.4.0",
"5.4.1",
"5.4.2",
"5.5.0",
"5.5.1",
"5.6.0",
"5.6.1",
"5.6.2",
"5.7.0",
"5.7.1",
"5.8.0",
"5.8.1",
"5.8.2",
"5.9.0",
"5.9.1",
"5.9.2"
]
}From 6.0.0 before 7.9.3
Fixed in 7.9.3
51 explicitly affected versions
6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.1.0, 6.1.1, 6.1.2, 6.2.0, 6.3.0, 6.3.1, 6.3.2, 6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1, 6.6.0, 6.6.1, 6.6.2, 6.7.0, 6.7.1, 6.7.2, 6.7.3, 6.8.0, 6.8.1, 6.8.2, 6.8.3, 6.8.4, 6.8.5, 6.8.6, 7.0.0, 7.0.1, 7.1.0, 7.1.1, 7.1.2, 7.2.0, 7.2.1, 7.3.0, 7.4.0, 7.4.1, 7.5.0, 7.5.1, 7.6.0, 7.6.1, 7.7.0, 7.7.1, 7.7.2, 7.8.0, 7.9.0, 7.9.1, 7.9.2
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "7.9.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"6.0.0",
"6.0.1",
"6.0.2",
"6.0.3",
"6.1.0",
"6.1.1",
"6.1.2",
"6.2.0",
"6.3.0",
"6.3.1",
"6.3.2",
"6.4.0",
"6.4.1",
"6.4.2",
"6.5.0",
"6.5.1",
"6.6.0",
"6.6.1",
"6.6.2",
"6.7.0",
"6.7.1",
"6.7.2",
"6.7.3",
"6.8.0",
"6.8.1",
"6.8.2",
"6.8.3",
"6.8.4",
"6.8.5",
"6.8.6",
"7.0.0",
"7.0.1",
"7.1.0",
"7.1.1",
"7.1.2",
"7.2.0",
"7.2.1",
"7.3.0",
"7.4.0",
"7.4.1",
"7.5.0",
"7.5.1",
"7.6.0",
"7.6.1",
"7.7.0",
"7.7.1",
"7.7.2",
"7.8.0",
"7.9.0",
"7.9.1",
"7.9.2"
]
}From 8.0.0 before 8.5.1
Fixed in 8.5.1
14 explicitly affected versions
8.0.0, 8.0.1, 8.0.2, 8.1.0, 8.1.1, 8.1.2, 8.2.0, 8.2.1, 8.2.2, 8.3.0, 8.3.1, 8.3.2, 8.4.0, 8.5.0
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.0",
"8.0.1",
"8.0.2",
"8.1.0",
"8.1.1",
"8.1.2",
"8.2.0",
"8.2.1",
"8.2.2",
"8.3.0",
"8.3.1",
"8.3.2",
"8.4.0",
"8.5.0"
]
}