How severe is CVE-2018-1000659?

CVE-2018-1000659 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1000659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000659?

CVE-2018-1000659 affects Limesurvey. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000659?

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

When was CVE-2018-1000659 published?

CVE-2018-1000659 was published on 2018-09-06 and last updated on 2026-06-17.

CVE-2018-1000659

CVE-2018-1000659 is a high-severity vulnerability in Limesurvey with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Limesurvey
Published: 2018-09-06
Last modified: 2026-06-17

Description

LimeSurvey version 3.14.4 and earlier contains a directory traversal in file upload that allows upload of webshell vulnerability in file upload functionality that can result in remote code execution as authenticated user. This attack appear to be exploitable via An authenticated user can upload a specially crafted zip file to get remote code execution. This vulnerability appears to have been fixed in after commit 72a02ebaaf95a80e26127ee7ee2b123cccce05a7 / version 3.14.4.

Frequently asked questions

What is CVE-2018-1000659?: LimeSurvey version 3.14.4 and earlier contains a directory traversal in file upload that allows upload of webshell vulnerability in file upload functionality that can result in remote code execution as authenticated user. This attack appear to be exploitable via An authenticated user can upload a specially crafted zip file to get remote code execution. This vulnerability appears to have been fixed in after commit 72a02ebaaf95a80e26127ee7ee2b123cccce05a7 / version 3.14.4.
How severe is CVE-2018-1000659?: CVE-2018-1000659 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-1000659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000659?: CVE-2018-1000659 affects Limesurvey. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-1000659 published?: CVE-2018-1000659 was published on 2018-09-06 and last updated on 2026-06-17.

References

https://github.com/LimeSurvey/LimeSurvey/commit/72a02ebaaf95a80e26127ee7ee2b123cccce05a7

Affected products (1)

cpe:2.3:a:limesurvey:limesurvey:*:*:*:*:*:*:*:*

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