How severe is CVE-2009-0543?

CVE-2009-0543 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-0543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0543?

CVE-2009-0543 affects Proftpd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-0543?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-0543 published?

CVE-2009-0543 was published on 2009-02-12 and last updated on 2026-06-16.

CVE-2009-0543

CVE-2009-0543 is a medium-severity vulnerability in Proftpd with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-89.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Proftpd
Published: 2009-02-12
Last modified: 2026-06-16

Description

ProFTPD Server 1.3.1, with NLS support enabled, allows remote attackers to bypass SQL injection protection mechanisms via invalid, encoded multibyte characters, which are not properly handled in (1) mod_sql_mysql and (2) mod_sql_postgres.

Frequently asked questions

What is CVE-2009-0543?: ProFTPD Server 1.3.1, with NLS support enabled, allows remote attackers to bypass SQL injection protection mechanisms via invalid, encoded multibyte characters, which are not properly handled in (1) mod_sql_mysql and (2) mod_sql_postgres.
How severe is CVE-2009-0543?: CVE-2009-0543 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-0543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0543?: CVE-2009-0543 affects Proftpd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-0543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0543 published?: CVE-2009-0543 was published on 2009-02-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:proftpd:proftpd:1.3.1:*:*:*:*:*:*:*

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