How severe is CVE-2020-11455?

CVE-2020-11455 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-2020-11455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 97% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11455?

CVE-2020-11455 primarily affects Limesurvey. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-11455?

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-2020-11455 published?

CVE-2020-11455 was published on 2020-04-01 and last updated on 2026-06-17.

CVE-2020-11455

CVE-2020-11455 is a critical-severity vulnerability in Limesurvey with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 97% places it in the 100th percentile, indicating an elevated likelihood of exploitation. 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: 97% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Limesurvey
Published: 2020-04-01
Last modified: 2026-06-17

Description

LimeSurvey before 4.1.12+200324 contains a path traversal vulnerability in application/controllers/admin/LimeSurveyFileManager.php.

Frequently asked questions

What is CVE-2020-11455?: LimeSurvey before 4.1.12+200324 contains a path traversal vulnerability in application/controllers/admin/LimeSurveyFileManager.php.
How severe is CVE-2020-11455?: CVE-2020-11455 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-2020-11455 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 97% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11455?: CVE-2020-11455 primarily affects Limesurvey. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-11455?: 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-2020-11455 published?: CVE-2020-11455 was published on 2020-04-01 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:limesurvey:limesurvey:*:*:*:*:*:*:*:*
cpe:2.3:a:limesurvey:limesurvey:4.1.12:-:*:*:*:*:*:*
cpe:2.3:a:limesurvey:limesurvey:4.1.12:200324:*:*:*:*:*:*

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