CVE-2026-73628 (GCVE-0-2026-73628)
Vulnerability from cvelistv5
Published
2026-08-13 11:28
Modified
2026-08-13 15:08
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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
Serendipity versions >= 2.3.5 and <= 2.6.0 contain a reflected cross-site scripting vulnerability in the search clean-URL route (/search/<term>). In include/functions_routing.inc.php serveSearch(), the sanitisation pipeline runs urldecode() after HTML-encoding, so a single URL-encoded HTML payload survives strip_tags() and htmlspecialchars() and is then decoded back into live HTML in the page. A crafted search link can execute arbitrary JavaScript in the victim's browser. Fixed in 2.6.1.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| s9y | Serendipity |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-73628",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-13T15:08:16.669318Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T15:08:52.238Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/s9y/Serendipity/security/advisories/GHSA-6c2x-mjmq-vx4q"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "affected",
"product": "Serendipity",
"vendor": "s9y",
"versions": [
{
"lessThan": "2.3.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:s9y:serendipity:2.5.0:-:*:*:*:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:s9y:serendipity:2.4.0:-:*:*:*:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:s9y:serendipity:2.6.0:beta1:*:*:*:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:s9y:serendipity:2.6.0:-:*:*:*:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:s9y:serendipity:2.4.0:beta1:*:*:*:*:*:*",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:s9y:serendipity:2.3.5:*:*:*:*:*:*:*",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "hutsbotnet"
}
],
"datePublic": "2026-07-26T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Serendipity versions \u003e= 2.3.5 and \u003c= 2.6.0 contain a reflected cross-site scripting vulnerability in the search clean-URL route (/search/\u003cterm\u003e). In include/functions_routing.inc.php serveSearch(), the sanitisation pipeline runs urldecode() after HTML-encoding, so a single URL-encoded HTML payload survives strip_tags() and htmlspecialchars() and is then decoded back into live HTML in the page. A crafted search link can execute arbitrary JavaScript in the victim\u0027s browser. Fixed in 2.6.1."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW"
},
"format": "CVSS"
},
{
"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"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-13T11:28:26.954Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-6c2x-mjmq-vx4q)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/s9y/Serendipity/security/advisories/GHSA-6c2x-mjmq-vx4q"
},
{
"name": "VulnCheck Advisory: Serendipity 2.3.5 Reflected XSS via search clean-URL route",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/serendipity-reflected-xss-via-search-clean-url-route"
}
],
"title": "Serendipity 2.3.5 Reflected XSS via search clean-URL route",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-73628",
"datePublished": "2026-08-13T11:28:26.954Z",
"dateReserved": "2026-08-13T11:17:25.160Z",
"dateUpdated": "2026-08-13T15:08:52.238Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-08-13T11:28:26.954Z\"}, \"datePublic\": \"2026-07-26T00:00:00.000Z\", \"title\": \"Serendipity 2.3.5 Reflected XSS via search clean-URL route\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"Serendipity versions \u003e= 2.3.5 and \u003c= 2.6.0 contain a reflected cross-site scripting vulnerability in the search clean-URL route (/search/\u003cterm\u003e). In include/functions_routing.inc.php serveSearch(), the sanitisation pipeline runs urldecode() after HTML-encoding, so a single URL-encoded HTML payload survives strip_tags() and htmlspecialchars() and is then decoded back into live HTML in the page. A crafted search link can execute arbitrary JavaScript in the victim\u0027s browser. Fixed in 2.6.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\", \"cweId\": \"CWE-79\", \"type\": \"CWE\"}]}], \"affected\": [{\"vendor\": \"s9y\", \"product\": \"Serendipity\", \"defaultStatus\": \"affected\", \"versions\": [{\"version\": \"0\", \"status\": \"unaffected\", \"versionType\": \"semver\", \"lessThan\": \"2.3.5\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:s9y:serendipity:2.5.0:-:*:*:*:*:*:*\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:s9y:serendipity:2.4.0:-:*:*:*:*:*:*\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:s9y:serendipity:2.6.0:beta1:*:*:*:*:*:*\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:s9y:serendipity:2.6.0:-:*:*:*:*:*:*\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:s9y:serendipity:2.4.0:beta1:*:*:*:*:*:*\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:s9y:serendipity:2.3.5:*:*:*:*:*:*:*\"}]}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"PASSIVE\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"LOW\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"LOW\", \"subIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\"}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\", \"baseScore\": 6.1, \"baseSeverity\": \"MEDIUM\"}}], \"references\": [{\"url\": \"https://github.com/s9y/Serendipity/security/advisories/GHSA-6c2x-mjmq-vx4q\", \"tags\": [\"vendor-advisory\"], \"name\": \"GitHub Security Advisory (GHSA-6c2x-mjmq-vx4q)\"}, {\"name\": \"VulnCheck Advisory: Serendipity 2.3.5 Reflected XSS via search clean-URL route\", \"tags\": [\"third-party-advisory\"], \"url\": \"https://www.vulncheck.com/advisories/serendipity-reflected-xss-via-search-clean-url-route\"}], \"credits\": [{\"lang\": \"en\", \"value\": \"hutsbotnet\", \"type\": \"reporter\"}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-73628\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-13T15:08:16.669318Z\"}}}], \"references\": [{\"url\": \"https://github.com/s9y/Serendipity/security/advisories/GHSA-6c2x-mjmq-vx4q\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-13T15:08:45.949Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-73628\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"VulnCheck\", \"dateReserved\": \"2026-08-13T11:17:25.160Z\", \"datePublished\": \"2026-08-13T11:28:26.954Z\", \"dateUpdated\": \"2026-08-13T15:08:52.238Z\"}",
"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…