How severe is CVE-2018-11248?

CVE-2018-11248 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11248 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11248?

CVE-2018-11248 affects Liulishuo Filedownloader. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11248?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-11248 published?

CVE-2018-11248 was published on 2018-05-18 and last updated on 2026-06-17.

CVE-2018-11248

CVE-2018-11248 is a critical-severity vulnerability in Liulishuo Filedownloader with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Liulishuo Filedownloader
Published: 2018-05-18
Last modified: 2026-06-17

Description

util/FileDownloadUtils.java in FileDownloader 1.7.3 does not check an attachment's name. If an attacker places "../" in the file name, the file can be stored in an unintended directory because of Directory Traversal.

Frequently asked questions

What is CVE-2018-11248?: util/FileDownloadUtils.java in FileDownloader 1.7.3 does not check an attachment's name. If an attacker places "../" in the file name, the file can be stored in an unintended directory because of Directory Traversal.
How severe is CVE-2018-11248?: CVE-2018-11248 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11248 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11248?: CVE-2018-11248 affects Liulishuo Filedownloader. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11248?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-11248 published?: CVE-2018-11248 was published on 2018-05-18 and last updated on 2026-06-17.

References

https://github.com/lingochamp/FileDownloader/issues/1028

Affected products (1)

cpe:2.3:a:liulishuo:filedownloader:1.7.3:*:*:*:*:*:*:*

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