diff --git a/core/src/androidTest/java/com/github/shadowsocks/database/ProfileTest.kt b/core/src/androidTest/java/com/github/shadowsocks/database/ProfileTest.kt
index 61aefccfd2..3a0b9dafd2 100644
--- a/core/src/androidTest/java/com/github/shadowsocks/database/ProfileTest.kt
+++ b/core/src/androidTest/java/com/github/shadowsocks/database/ProfileTest.kt
@@ -33,4 +33,18 @@ class ProfileTest {
         Assert.assertEquals("ss://YmYtY2ZiOnRlc3Q@192.168.100.1:8888#example-server".toUri(),
                 results.single().toUri())
     }
+
+    @Test
+    fun parsingPlainUserInfo() {
+        val results = Profile.findAllUrls(
+                "ss://2022-blake3-chacha20-poly1305:F6BY4IwbXB5Juobo2aofoJ6P86G%2FyBYJO3pJzcMIUOU%3D@1.2.3.4:8400")
+                .toList()
+        Assert.assertEquals(1, results.size)
+        results.single().also {
+            Assert.assertEquals("2022-blake3-chacha20-poly1305", it.method)
+            Assert.assertEquals("F6BY4IwbXB5Juobo2aofoJ6P86G/yBYJO3pJzcMIUOU=", it.password)
+            Assert.assertEquals("1.2.3.4", it.host)
+            Assert.assertEquals(8400, it.remotePort)
+        }
+    }
 }
diff --git a/core/src/main/java/com/github/shadowsocks/database/Profile.kt b/core/src/main/java/com/github/shadowsocks/database/Profile.kt
index 01a2540ad2..8f5e82f5b3 100644
--- a/core/src/main/java/com/github/shadowsocks/database/Profile.kt
+++ b/core/src/main/java/com/github/shadowsocks/database/Profile.kt
@@ -109,6 +109,15 @@ data class Profile(
         private val userInfoPattern = "^(.+?):(.*)$".toRegex()
         private val legacyPattern = "^(.+?):(.*)@(.+?):(\\d+?)$".toRegex()
 
+        private fun userInfoCandidates(uri: Uri) = sequence {
+            uri.userInfo?.also { userInfo ->
+                try {
+                    yield(String(Base64.decode(userInfo, Base64.NO_PADDING or Base64.NO_WRAP or Base64.URL_SAFE)))
+                } catch (_: IllegalArgumentException) { }
+                yield(userInfo)
+            }
+        }
+
         fun findAllUrls(data: CharSequence?, feature: Profile? = null) = pattern.findAll(data ?: "").map {
             val uri = it.value.toUri()
             try {
@@ -129,8 +138,7 @@ data class Profile(
                         null
                     }
                 } else {
-                    val match = userInfoPattern.matchEntire(String(Base64.decode(uri.userInfo,
-                            Base64.NO_PADDING or Base64.NO_WRAP or Base64.URL_SAFE)))
+                    val match = userInfoCandidates(uri).mapNotNull(userInfoPattern::matchEntire).firstOrNull()
                     if (match != null) {
                         val profile = Profile()
                         feature?.copyFeatureSettingsTo(profile)