Concrete CMS's RSS Displayer block accepts a feed URL from any page editor and fetches it server-side without validation
The advisory, in context
In Concrete CMS 9.5.0 and below, the RSS Displayer block accepts a feed URL from any page editor and fetches it server-side without validation enabling redirect-to-internal bypasses.
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 before 9.5.1
Fixed in 9.5.1
89 explicitly affected versions
8.0, 8.0.1, 8.0.2, 8.0.3, 8.1.0, 8.2.0, 8.2.0RC2, 8.2.1, 8.3.0, 8.3.1, 8.3.2, 8.4.0, 8.4.0RC3, 8.4.0RC4, 8.4.1, 8.4.2, 8.4.3, 8.4.4, 8.4.5, 8.5.0, 8.5.0RC1, 8.5.0RC2, 8.5.1, 8.5.10, 8.5.11, 8.5.12, 8.5.13, 8.5.14, 8.5.15, 8.5.16, 8.5.17, 8.5.18, 8.5.19, 8.5.2, 8.5.20, 8.5.21, 8.5.3, 8.5.4, 8.5.5, 8.5.6, 8.5.6RC1, 8.5.7, 8.5.8, 8.5.9, 9.0.0, 9.0.0RC1, 9.0.0RC3, 9.0.0RC4, 9.0.1, 9.0.2, 9.1.0, 9.1.1, 9.1.2, 9.1.3, 9.2.0, 9.2.0RC2, 9.2.1, 9.2.2, 9.2.3, 9.2.4, 9.2.5, 9.2.6, 9.2.7, 9.2.8, 9.2.9, 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4, 9.3.5, 9.3.6, 9.3.7, 9.3.8, 9.3.9, 9.4.0, 9.4.0RC1, 9.4.0RC2, 9.4.1, 9.4.2, 9.4.3, 9.4.4, 9.4.5, 9.4.6, 9.4.7, 9.4.8, 9.5.0, 9.5.0RC1, 9.5.0RC2
View affected-version evidence
{
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0",
"8.0.1",
"8.0.2",
"8.0.3",
"8.1.0",
"8.2.0",
"8.2.0RC2",
"8.2.1",
"8.3.0",
"8.3.1",
"8.3.2",
"8.4.0",
"8.4.0RC3",
"8.4.0RC4",
"8.4.1",
"8.4.2",
"8.4.3",
"8.4.4",
"8.4.5",
"8.5.0",
"8.5.0RC1",
"8.5.0RC2",
"8.5.1",
"8.5.10",
"8.5.11",
"8.5.12",
"8.5.13",
"8.5.14",
"8.5.15",
"8.5.16",
"8.5.17",
"8.5.18",
"8.5.19",
"8.5.2",
"8.5.20",
"8.5.21",
"8.5.3",
"8.5.4",
"8.5.5",
"8.5.6",
"8.5.6RC1",
"8.5.7",
"8.5.8",
"8.5.9",
"9.0.0",
"9.0.0RC1",
"9.0.0RC3",
"9.0.0RC4",
"9.0.1",
"9.0.2",
"9.1.0",
"9.1.1",
"9.1.2",
"9.1.3",
"9.2.0",
"9.2.0RC2",
"9.2.1",
"9.2.2",
"9.2.3",
"9.2.4",
"9.2.5",
"9.2.6",
"9.2.7",
"9.2.8",
"9.2.9",
"9.3.0",
"9.3.1",
"9.3.2",
"9.3.3",
"9.3.4",
"9.3.5",
"9.3.6",
"9.3.7",
"9.3.8",
"9.3.9",
"9.4.0",
"9.4.0RC1",
"9.4.0RC2",
"9.4.1",
"9.4.2",
"9.4.3",
"9.4.4",
"9.4.5",
"9.4.6",
"9.4.7",
"9.4.8",
"9.5.0",
"9.5.0RC1",
"9.5.0RC2"
]
}