diff --git a/gcp/website/frontend3/src/go/templates/vulnerability.html b/gcp/website/frontend3/src/go/templates/vulnerability.html
index c9702d3a60e..8acfee4ebb6 100644
--- a/gcp/website/frontend3/src/go/templates/vulnerability.html
+++ b/gcp/website/frontend3/src/go/templates/vulnerability.html
@@ -103,12 +103,14 @@ <h1 class="title">
                 {{ if .IsCVSS }}
                   <span class="severity-level severity-{{ .Level }}">{{ .Rating }}</span>
                   {{ .Type }} - {{ .Score }}
+                  {{ if .Source }}(Source: {{ .Source }}){{ end }}
                   {{ if .CalculatorURL }}
                   <a href="{{ .CalculatorURL }}" target="_blank" rel="nofollow noopener noreferrer">
                     CVSS Calculator</a>
                   {{ end }}
                 {{ else }}
                   <span class="severity-level severity-invalid">{{ .Type }} - {{ .Score }}</span>
+                  {{ if .Source }}(Source: {{ .Source }}){{ end }}
                 {{ end }}
               </li>
               {{ end }}
@@ -222,12 +224,14 @@ <h3 class="mdc-layout-grid__cell--span-3">Severity</h3>
                         {{ if .IsCVSS }}
                           <span class="severity-level severity-{{ .Level }}">{{ .Rating }}</span>
                           {{ .Type }} - {{ .Score }}
+                          {{ if .Source }}(Source: {{ .Source }}){{ end }}
                           {{ if .CalculatorURL }}
                           <a href="{{ .CalculatorURL }}" target="_blank" rel="nofollow noopener noreferrer">
                             CVSS Calculator</a>
                           {{ end }}
                         {{ else }}
                           <span class="severity-level severity-invalid">{{ .Type }} - {{ .Score }}</span>
+                          {{ if .Source }}(Source: {{ .Source }}){{ end }}
                         {{ end }}
                       </li>
                       {{ end }}
@@ -379,12 +383,14 @@ <h3 class="mdc-layout-grid__cell--span-3">
                 {{ if .IsCVSS }}
                   <span class="severity-level severity-{{ .Level }}">{{ .Rating }}</span>
                   {{ .Type }} - {{ .Score }}
+                  {{ if .Source }}(Source: {{ .Source }}){{ end }}
                   {{ if .CalculatorURL }}
                   <a href="{{ .CalculatorURL }}" target="_blank" rel="nofollow noopener noreferrer">
                     CVSS Calculator</a>
                   {{ end }}
                 {{ else }}
                   <span class="severity-level severity-invalid">{{ .Type }} - {{ .Score }}</span>
+                  {{ if .Source }}(Source: {{ .Source }}){{ end }}
                 {{ end }}
               </li>
               {{ end }}
diff --git a/gcp/website/frontend3/src/templates/vulnerability.html b/gcp/website/frontend3/src/templates/vulnerability.html
index 915032ce1db..6ffb9794f71 100644
--- a/gcp/website/frontend3/src/templates/vulnerability.html
+++ b/gcp/website/frontend3/src/templates/vulnerability.html
@@ -107,10 +107,12 @@ <h1 class="title">
                 {% if item | is_cvss %}
                   <span class="severity-level severity-{{ item | severity_level }}">{{ item | display_severity_rating }}</span>
                   {{ item.type }} - {{ item.score }}
+                  {% if item.source %}(Source: {{ item.source }}){% endif %}
                   <a href="{{ item | cvss_calculator_url }}" target="_blank" rel="nofollow noopener noreferrer">
                     CVSS Calculator</a>
                 {% else %}
                   <span class="severity-level severity-invalid">{{ item.type }} - {{ item.score }}</span>
+                  {% if item.source %}(Source: {{ item.source }}){% endif %}
                 {% endif %}
               </li>
               {% endfor -%}
@@ -227,10 +229,12 @@ <h3 class="mdc-layout-grid__cell--span-3">Severity</h3>
                         {% if item | is_cvss %}
                           <span class="severity-level severity-{{ item | severity_level }}">{{ item | display_severity_rating }}</span>
                           {{ item.type }} - {{ item.score }}
+                          {% if item.source %}(Source: {{ item.source }}){% endif %}
                           <a href="{{ item | cvss_calculator_url }}" target="_blank" rel="nofollow noopener noreferrer">
                             CVSS Calculator</a>
                         {% else %}
                           <span class="severity-level severity-invalid">{{ item.type }} - {{ item.score }}</span>
+                          {% if item.source %}(Source: {{ item.source }}){% endif %}
                         {% endif %}
                       </li>
                       {% endfor -%}
@@ -400,10 +404,12 @@ <h3 class="mdc-layout-grid__cell--span-3">
                 {% if item | is_cvss %}
                   <span class="severity-level severity-{{ item | severity_level }}">{{ item | display_severity_rating }}</span>
                   {{ item.type }} - {{ item.score }}
+                  {% if item.source %}(Source: {{ item.source }}){% endif %}
                   <a href="{{ item | cvss_calculator_url }}" target="_blank" rel="nofollow noopener noreferrer">
                     CVSS Calculator</a>
                 {% else %}
                   <span class="severity-level severity-invalid">{{ item.type }} - {{ item.score }}</span>
+                  {% if item.source %}(Source: {{ item.source }}){% endif %}
                 {% endif %}
               </li>
               {% endfor -%}
diff --git a/gcp/website/testdata/osv/CVE-2021-44228.json b/gcp/website/testdata/osv/CVE-2021-44228.json
index 5519e3ec505..90fa5d2d765 100644
--- a/gcp/website/testdata/osv/CVE-2021-44228.json
+++ b/gcp/website/testdata/osv/CVE-2021-44228.json
@@ -3,6 +3,13 @@
   "modified": "2025-02-04T00:00:00Z",
   "published": "2023-08-14T00:00:00Z",
   "summary": "Log4Shell demo entry",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
+      "source": "NVD"
+    }
+  ],
   "affected": []
 }
 
diff --git a/go/internal/website/vulnerability_models.go b/go/internal/website/vulnerability_models.go
index 74e3c9f56ad..0af0c0b70dc 100644
--- a/go/internal/website/vulnerability_models.go
+++ b/go/internal/website/vulnerability_models.go
@@ -11,6 +11,7 @@ import (
 type SeverityDisplay struct {
 	Type          string
 	Score         string
+	Source        string
 	IsCVSS        bool
 	Level         string // e.g. "low", "medium", "high", "critical"
 	Rating        string // e.g. "7.5 (High)" or "7.5"
diff --git a/go/internal/website/vulnerability_view.go b/go/internal/website/vulnerability_view.go
index d3d3ada1852..142ec0e527a 100644
--- a/go/internal/website/vulnerability_view.go
+++ b/go/internal/website/vulnerability_view.go
@@ -156,7 +156,12 @@ func (v VulnerabilityPageData) Severities() []SeverityDisplay {
 	id := v.Vulnerability.GetId()
 	displays := make([]SeverityDisplay, 0, len(severities))
 	for _, sev := range severities {
+		source := ""
+		if sev.GetSource() != osvschema.Severity_SOURCE_UNSPECIFIED {
+			source = sev.GetSource().String()
+		}
 		if display, ok := ParseSeverityDisplay(sev.GetType(), sev.GetScore(), id); ok {
+			display.Source = source
 			displays = append(displays, display)
 		} else {
 			// This probably only happens if the CVSS score itself is wrong.
@@ -166,6 +171,7 @@ func (v VulnerabilityPageData) Severities() []SeverityDisplay {
 				Level:  "invalid",
 				Type:   sev.GetType().String(),
 				Score:  sev.GetScore(),
+				Source: source,
 				Rating: "Invalid Severity Rating",
 			})
 		}
diff --git a/go/internal/website/vulnerability_view_test.go b/go/internal/website/vulnerability_view_test.go
index 4e9593bbb44..bdcb7407c53 100644
--- a/go/internal/website/vulnerability_view_test.go
+++ b/go/internal/website/vulnerability_view_test.go
@@ -11,16 +11,20 @@ func TestSeverities(t *testing.T) {
 		name        string
 		sevType     osvschema.Severity_Type
 		score       string
+		source      osvschema.Severity_Source
 		wantCalcURL string
 		wantLevel   string
+		wantSource  string
 		wantCount   int
 	}{
 		{
 			name:        "CVSS v2.0 valid vector",
 			sevType:     osvschema.Severity_CVSS_V2,
 			score:       "AV:N/AC:L/Au:N/C:P/I:P/A:P",
+			source:      osvschema.Severity_NVD,
 			wantCalcURL: firstCVSSCalculatorBaseURL + "/2.0#AV:N/AC:L/Au:N/C:P/I:P/A:P",
 			wantLevel:   "",
+			wantSource:  "NVD",
 			wantCount:   1,
 		},
 		{
@@ -64,8 +68,9 @@ func TestSeverities(t *testing.T) {
 					Id: "GHSA-1234-abcd",
 					Severity: []*osvschema.Severity{
 						{
-							Type:  tt.sevType,
-							Score: tt.score,
+							Type:   tt.sevType,
+							Score:  tt.score,
+							Source: tt.source,
 						},
 					},
 				},
@@ -83,6 +88,9 @@ func TestSeverities(t *testing.T) {
 				if d.Level != tt.wantLevel {
 					t.Errorf("Level = %q, want %q", d.Level, tt.wantLevel)
 				}
+				if d.Source != tt.wantSource {
+					t.Errorf("Source = %q, want %q", d.Source, tt.wantSource)
+				}
 			}
 		})
 	}