CVE-2026-82535 (GCVE-0-2026-82535)
Vulnerability from cvelistv5
Published
2026-09-11 17:09
Modified
2026-10-01 15:21
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
VLAI Severity ?
EPSS score ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
Chamilo LMS before 1.11.42 and 3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious script payloads into survey answers by computing deterministic invitation codes and bypassing authorization checks in the survey submission endpoint. Attackers can submit crafted answers containing unescaped HTML rendered in reporting views to execute arbitrary scripts in the browser sessions of teachers or administrators, enabling persistent backdoor account creation by exploiting the victim's authenticated session.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| chamilo | chamilo-lms |
Version: 1.11.0 ≤ 1.11.40 Version: 2.0.0 ≤ 2.0.3 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-82535",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-11T19:21:14.253000Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-11T19:21:27.326Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:github/chamilo/chamilo-lms",
"product": "chamilo-lms",
"repo": "https://github.com/chamilo/chamilo-lms",
"vendor": "chamilo",
"versions": [
{
"lessThanOrEqual": "1.11.40",
"status": "affected",
"version": "1.11.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "2.0.3",
"status": "affected",
"version": "2.0.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.11.42",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.0.0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*",
"versionEndIncluding": "1.11.40",
"versionStartIncluding": "1.11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*",
"versionEndIncluding": "2.0.3",
"versionStartIncluding": "2.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Jon Bytyqi"
},
{
"lang": "en",
"type": "finder",
"value": "Leon Bytyci"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulnCheck"
}
],
"datePublic": "2026-09-08T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Chamilo LMS before 1.11.42 and 3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious script payloads into survey answers by computing deterministic invitation codes and bypassing authorization checks in the survey submission endpoint. Attackers can submit crafted answers containing unescaped HTML rendered in reporting views to execute arbitrary scripts in the browser sessions of teachers or administrators, enabling persistent backdoor account creation by exploiting the victim\u0027s authenticated session."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-01T15:21:45.223Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-m3wr-p8wj-jmf6)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-m3wr-p8wj-jmf6"
},
{
"name": "Chamilo LMS v3.0.0 Release Notes",
"tags": [
"release-notes"
],
"url": "https://github.com/chamilo/chamilo-lms/releases/tag/v3.0.0"
},
{
"name": "Patch Commit (3.0.x)",
"tags": [
"patch"
],
"url": "https://github.com/chamilo/chamilo-lms/commit/be45f2f2a29319afbbf9ce27d094698911799d10"
},
{
"name": "Patch Commit (1.11.x)",
"tags": [
"patch"
],
"url": "https://github.com/chamilo/chamilo-lms/commit/c9d2614d798571b94cef1cb61e605a2fc89f0386"
},
{
"name": "Patch Commit (1.11.x)",
"tags": [
"patch"
],
"url": "https://github.com/chamilo/chamilo-lms/commit/bea9cbcfc6ca58f387c6c25bef2f15dc5df9d147"
},
{
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/chamilo-lms-stored-xss-via-survey-answer-submission-in-reporting-php"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Chamilo LMS Stored XSS via Survey Answer Submission in reporting.php",
"x_generator": {
"engine": "vulncheck"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-82535",
"datePublished": "2026-09-11T17:09:37.856Z",
"dateReserved": "2026-08-29T17:20:57.083Z",
"dateUpdated": "2026-10-01T15:21:45.223Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-82535\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-11T19:21:14.253000Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-11T19:21:19.922Z\"}}], \"cna\": {\"title\": \"Chamilo LMS Stored XSS via Survey Answer Submission in reporting.php\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Jon Bytyqi\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Leon Bytyci\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"VulnCheck\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 5.3, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"PASSIVE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"LOW\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 6.1, \"attackVector\": \"NETWORK\", \"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\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/chamilo/chamilo-lms\", \"vendor\": \"chamilo\", \"product\": \"chamilo-lms\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.11.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"1.11.40\"}, {\"status\": \"affected\", \"version\": \"2.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2.0.3\"}, {\"status\": \"unaffected\", \"version\": \"1.11.42\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"3.0.0\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:github/chamilo/chamilo-lms\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-09-08T00:00:00.000Z\", \"references\": [{\"url\": \"https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-m3wr-p8wj-jmf6\", \"name\": \"GitHub Security Advisory (GHSA-m3wr-p8wj-jmf6)\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/chamilo/chamilo-lms/releases/tag/v3.0.0\", \"name\": \"Chamilo LMS v3.0.0 Release Notes\", \"tags\": [\"release-notes\"]}, {\"url\": \"https://github.com/chamilo/chamilo-lms/commit/be45f2f2a29319afbbf9ce27d094698911799d10\", \"name\": \"Patch Commit (3.0.x)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/chamilo/chamilo-lms/commit/c9d2614d798571b94cef1cb61e605a2fc89f0386\", \"name\": \"Patch Commit (1.11.x)\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/chamilo/chamilo-lms/commit/bea9cbcfc6ca58f387c6c25bef2f15dc5df9d147\", \"name\": \"Patch Commit (1.11.x)\", \"tags\": [\"patch\"]}, {\"url\": \"https://www.vulncheck.com/advisories/chamilo-lms-stored-xss-via-survey-answer-submission-in-reporting-php\", \"tags\": [\"third-party-advisory\"]}], \"x_generator\": {\"engine\": \"vulncheck\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Chamilo LMS before 1.11.42 and 3.0.0 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious script payloads into survey answers by computing deterministic invitation codes and bypassing authorization checks in the survey submission endpoint. Attackers can submit crafted answers containing unescaped HTML rendered in reporting views to execute arbitrary scripts in the browser sessions of teachers or administrators, enabling persistent backdoor account creation by exploiting the victim\u0027s authenticated session.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndIncluding\": \"1.11.40\", \"versionStartIncluding\": \"1.11.0\"}, {\"criteria\": \"cpe:2.3:a:chamilo:chamilo_lms:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndIncluding\": \"2.0.3\", \"versionStartIncluding\": \"2.0.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-10-01T15:21:45.223Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-82535\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-01T15:21:45.223Z\", \"dateReserved\": \"2026-08-29T17:20:57.083Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-09-11T17:09:37.856Z\", \"assignerShortName\": \"VulnCheck\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…