How severe is CVE-2018-1000526?

CVE-2018-1000526 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 none, integrity none, and availability high.

Is CVE-2018-1000526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000526?

CVE-2018-1000526 affects Openpsa2 Openpsa. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000526?

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-2018-1000526 published?

CVE-2018-1000526 was published on 2018-06-26 and last updated on 2026-06-17.

CVE-2018-1000526

CVE-2018-1000526 is a high-severity vulnerability in Openpsa2 Openpsa 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-91.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-91
Affected product: Openpsa2 Openpsa
Published: 2018-06-26
Last modified: 2026-06-17

Description

Openpsa contains a XML Injection vulnerability in RSS file upload feature that can result in Remote denial of service. This attack appear to be exploitable via Specially crafted XML file. This vulnerability appears to have been fixed in after commit 4974a26.

Frequently asked questions

What is CVE-2018-1000526?: Openpsa contains a XML Injection vulnerability in RSS file upload feature that can result in Remote denial of service. This attack appear to be exploitable via Specially crafted XML file. This vulnerability appears to have been fixed in after commit 4974a26.
How severe is CVE-2018-1000526?: CVE-2018-1000526 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 none, integrity none, and availability high.
Is CVE-2018-1000526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000526?: CVE-2018-1000526 affects Openpsa2 Openpsa. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000526?: 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-2018-1000526 published?: CVE-2018-1000526 was published on 2018-06-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openpsa2:openpsa:-:*:*:*:*:*:*:*

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