CVE-2019-3810

Status: ModifiedMedium (6.1)—Exploit

Severity6.1Medium · CVSS 3.1

Exploitation probability14 %higher than 97% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB · Proof of concept on GitHub (unverified)

A flaw was found in moodle versions 3.6 to 3.6.1, 3.5 to 3.5.3, 3.4 to 3.4.6, 3.1 to 3.1.15 and earlier unsupported versions. The /userpix/ page did not escape users' full names, which are included as text when hovering over profile images. Note this page is not linked to by default and its access is restricted.

CVSS

Base score: 6.1
Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 14 %
Percentile among all scored CVEs: 97
Score date: 10/29/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Moodle 3.6.1 - Persistent Cross-Site Scripting (XSS) (4/30/2021)
Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Moodle — Moodle

CWEs

CWE-79
CWE-79

References

Show 8 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2019-3810",
  "cveTags": [],
  "metrics": {
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
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    "cvssMetricV30": [
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        "cvssData": {
          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
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    "cvssMetricV31": [
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        "type": "Primary",
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        "cvssData": {
          "scope": "CHANGED",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
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    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "[UNKNOWN]",
          "product": "moodle",
          "versions": [
            {
              "status": "affected",
              "version": "3.6.2"
            },
            {
              "status": "affected",
              "version": "3.5.4"
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            {
              "status": "affected",
              "version": "3.4.7"
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              "status": "affected",
              "version": "3.1.16"
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  "published": "2019-03-25T18:29:00.807",
  "references": [
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      "url": "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-64372",
      "tags": [
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      "source": "secalert@redhat.com"
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      "url": "http://packetstormsecurity.com/files/162399/Moodle-3.6.1-Cross-Site-Scripting.html",
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      "tags": [
        "Issue Tracking",
        "Patch",
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      "source": "secalert@redhat.com"
    },
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      "url": "https://moodle.org/mod/forum/discuss.php?d=381230#p1536767",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "secalert@redhat.com"
    },
    {
      "url": "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-64372",
      "tags": [
        "Patch",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://packetstormsecurity.com/files/162399/Moodle-3.6.1-Cross-Site-Scripting.html",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3810",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "secalert@redhat.com",
      "description": [
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          "value": "CWE-79"
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
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  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in moodle versions 3.6 to 3.6.1, 3.5 to 3.5.3, 3.4 to 3.4.6, 3.1 to 3.1.15 and earlier unsupported versions. The /userpix/ page did not escape users' full names, which are included as text when hovering over profile images. Note this page is not linked to by default and its access is restricted."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un error en Moodle, desde la versión 3.6 hasta la 3.6.1, de la 3.5 a la 3.5.3, de la 3.4 a la 3.4.6 y desde la 3.1 hasta la 3.1.15, así como en versiones anteriores sin soporte. La página /userprix/ no escapó los nombres completos de los usuarios, que están incluidos como texto al desplazarse sobre las imágenes. Nótese que no hay enlaces que redirijan a esta página por defecto y que el acceso a la misma está restringido."
    }
  ],
  "lastModified": "2026-06-17T02:35:38.123",
  "configurations": [
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}