CVE-2026-100716 (GCVE-0-2026-100716)

Vulnerability from cvelistv5 – Published: 2026-09-26 13:24 – Updated: 2026-09-26 13:24
VLAI
Title
Froxlor before 2.3.12 Privilege Escalation via Symlink
Summary
Froxlor is a server administration panel. In versions 2.3.10 and earlier, the customer data-export (DataDump) cron fails to validate intermediate path components of the export destination: Froxlor\FileDir::makeCorrectDir() contains an off-by-one in its path-component walk that skips the first segment below the customer home directory, and the guard in ExportCron.php checks only the final component with is_link(). An authenticated customer whose account has the export feature enabled can schedule an export into a genuine subdirectory of their own webspace, then replace an intermediate path component with a symlink before the root-owned cron runs. The cron's `chown -R` then recursively changes ownership of the linked directory tree — for example /etc — to the customer's UID, yielding host root and cross-tenant compromise. Exploitation is deterministic and requires no race. This is an incomplete fix of GHSA-75h4-... The issue is fixed in Froxlor 2.3.12.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
Impacted products
Vendor Product Version CPE status
froxlor froxlor Affected: 0 , < 2.3.12 (semver)
Unaffected: 2.3.12 (semver)
    cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-06 00:00
Credits
skeletonsec
Show details on NVD website
To clipboard 

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        }
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              "description": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
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          "name": "GitHub Security Advisory (GHSA-2wjc-6mgx-hq42)",
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          "url": "https://github.com/froxlor/froxlor/security/advisories/GHSA-2wjc-6mgx-hq42"
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    "datePublished": "2026-09-26T13:24:07.854Z",
    "dateReserved": "2026-09-26T02:40:56.225Z",
    "dateUpdated": "2026-09-26T13:24:07.854Z",
    "state": "PUBLISHED"
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          }
        ],
        "id": "CVE-2026-100716",
        "lastModified": "2026-09-26T14:16:57.707",
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                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
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}



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