How severe is CVE-2021-31783?

CVE-2021-31783 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-31783 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31783?

CVE-2021-31783 affects Piwigo Localfiles Editor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31783?

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-2021-31783 published?

CVE-2021-31783 was published on 2021-04-26 and last updated on 2026-06-17.

CVE-2021-31783

CVE-2021-31783 is a high-severity vulnerability in Piwigo Localfiles Editor with a CVSS 3.x base score of 7.5. 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-345.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Piwigo Localfiles Editor
Published: 2021-04-26
Last modified: 2026-06-17

Description

show_default.php in the LocalFilesEditor extension before 11.4.0.1 for Piwigo allows Local File Inclusion because the file parameter is not validated with a proper regular-expression check.

Frequently asked questions

What is CVE-2021-31783?: show_default.php in the LocalFilesEditor extension before 11.4.0.1 for Piwigo allows Local File Inclusion because the file parameter is not validated with a proper regular-expression check.
How severe is CVE-2021-31783?: CVE-2021-31783 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-31783 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31783?: CVE-2021-31783 affects Piwigo Localfiles Editor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31783?: 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-2021-31783 published?: CVE-2021-31783 was published on 2021-04-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:piwigo:localfiles_editor:*:*:*:*:*:piwigo:*:*

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