CVE-2023-29545
Status: ModifiedMedium (6.5)—
Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user.
*This bug only affects Firefox and Thunderbird on Windows. Other versions of Firefox and Thunderbird are unaffected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- Base score: 6.5
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.58%
- Percentile among all scored CVEs: 46
- Score date: 10/7/2026
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).
Affected technologies (3)
CWEs
- NVD-CWE-noinfo
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1823077
- https://www.mozilla.org/security/advisories/mfsa2023-13/
- https://www.mozilla.org/security/advisories/mfsa2023-14/
- https://www.mozilla.org/security/advisories/mfsa2023-15/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1823077
- https://www.mozilla.org/security/advisories/mfsa2023-13/
- https://www.mozilla.org/security/advisories/mfsa2023-14/
- https://www.mozilla.org/security/advisories/mfsa2023-15/
Raw JSON (NVD)
Show
{
"id": "CVE-2023-29545",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-29545",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-12-11T15:48:18.012040Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
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"baseScore": 6.5,
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"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.8
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
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"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "security@mozilla.org",
"affectedData": [
{
"vendor": "Mozilla",
"product": "Firefox",
"versions": [
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"version": "unspecified",
"lessThan": "112",
"versionType": "custom"
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],
"defaultStatus": "unaffected"
},
{
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"defaultStatus": "unaffected"
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{
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"product": "Thunderbird",
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"version": "unspecified",
"lessThan": "102.10",
"versionType": "custom"
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],
"defaultStatus": "unaffected"
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}
],
"published": "2023-06-19T11:15:09.890",
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1823077",
"tags": [
"Permissions Required"
],
"source": "security@mozilla.org"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2023-13/",
"tags": [
"Vendor Advisory"
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"source": "security@mozilla.org"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2023-14/",
"tags": [
"Vendor Advisory"
],
"source": "security@mozilla.org"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2023-15/",
"tags": [
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"source": "security@mozilla.org"
},
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1823077",
"tags": [
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"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
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"tags": [
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"source": "af854a3a-2127-422b-91ae-364da2661108"
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{
"url": "https://www.mozilla.org/security/advisories/mfsa2023-14/",
"tags": [
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"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2023-15/",
"tags": [
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],
"source": "af854a3a-2127-422b-91ae-364da2661108"
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],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment variable names would have resolved those in the context of the current user. \n\n*This bug only affects Firefox and Thunderbird on Windows. Other versions of Firefox and Thunderbird are unaffected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.\n\n"
}
],
"lastModified": "2026-06-17T05:50:30.990",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
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"vulnerable": true,
"matchCriteriaId": "8C6578F4-B46C-473F-8A17-CA6026C32FBE",
"versionEndExcluding": "112.0"
},
{
"criteria": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "03736567-251A-4F75-992E-AB7C957FB587",
"versionEndExcluding": "102.10"
},
{
"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
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"matchCriteriaId": "7C8C9D9E-9BDA-475D-B7D6-10D1C6E9DD72",
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"operator": "OR"
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}
],
"sourceIdentifier": "security@mozilla.org"
}