How severe is CVE-2025-59431?

CVE-2025-59431 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-2025-59431 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59431?

CVE-2025-59431 affects Osgeo Mapserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59431?

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.

Does CVE-2025-59431 have an EU (EUVD) identifier?

Yes. CVE-2025-59431 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30323.

When was CVE-2025-59431 published?

CVE-2025-59431 was published on 2025-09-19 and last updated on 2026-06-17.

CVE-2025-59431

CVE-2025-59431 is a critical-severity vulnerability in Osgeo Mapserver 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.9
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30323
Weakness: CWE-89
Affected product: Osgeo Mapserver
Published: 2025-09-19
Last modified: 2026-06-17

Description

MapServer is a system for developing web-based GIS applications. Prior to 8.4.1, the XML Filter Query directive PropertyName is vulnerably to Boolean-based SQL injection. It seems like expression checking is bypassed by introducing double quote characters in the PropertyName. Allowing to manipulate backend database queries. This vulnerability is fixed in 8.4.1.

Frequently asked questions

What is CVE-2025-59431?: MapServer is a system for developing web-based GIS applications. Prior to 8.4.1, the XML Filter Query directive PropertyName is vulnerably to Boolean-based SQL injection. It seems like expression checking is bypassed by introducing double quote characters in the PropertyName. Allowing to manipulate backend database queries. This vulnerability is fixed in 8.4.1.
How severe is CVE-2025-59431?: CVE-2025-59431 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-2025-59431 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59431?: CVE-2025-59431 affects Osgeo Mapserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59431?: 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.
Does CVE-2025-59431 have an EU (EUVD) identifier?: Yes. CVE-2025-59431 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30323.
When was CVE-2025-59431 published?: CVE-2025-59431 was published on 2025-09-19 and last updated on 2026-06-17.

References

https://github.com/MapServer/MapServer/security/advisories/GHSA-256m-rx4h-r55w

Affected products (1)

cpe:2.3:a:osgeo:mapserver:8.4.0:-:*:*:*:*:*:*

More vulnerabilities in Osgeo Mapserver

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CVE-2009-0840 — Critical (CVSS 10.0): Heap-based buffer underflow in the readPostBody function in cgiutil.c in mapserv in MapServer 4.x before 4.10.4 and 5.x…

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