How severe is CVE-2018-5259?

CVE-2018-5259 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-5259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5259?

CVE-2018-5259 affects Discuz Discuzx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-5259?

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-2018-5259 published?

CVE-2018-5259 was published on 2018-01-08 and last updated on 2026-06-17.

CVE-2018-5259

CVE-2018-5259 is a high-severity vulnerability in Discuz Discuzx with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Discuz Discuzx
Published: 2018-01-08
Last modified: 2026-06-17

Description

Discuz! DiscuzX X3.4 allows remote authenticated users to bypass intended attachment-deletion restrictions via a modified aid parameter.

Frequently asked questions

What is CVE-2018-5259?: Discuz! DiscuzX X3.4 allows remote authenticated users to bypass intended attachment-deletion restrictions via a modified aid parameter.
How severe is CVE-2018-5259?: CVE-2018-5259 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-5259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5259?: CVE-2018-5259 affects Discuz Discuzx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-5259?: 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-2018-5259 published?: CVE-2018-5259 was published on 2018-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:discuz:discuzx:x3.4:*:*:*:*:*:*:*

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