How severe is CVE-2023-26852?

CVE-2023-26852 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-26852 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-2023-26852?

CVE-2023-26852 affects Textpattern. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-26852?

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-2023-26852 published?

CVE-2023-26852 was published on 2023-04-12 and last updated on 2026-06-17.

CVE-2023-26852

CVE-2023-26852 is a high-severity vulnerability in Textpattern with a CVSS 3.x base score of 7.2. 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-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Textpattern
Published: 2023-04-12
Last modified: 2026-06-17

Description

An arbitrary file upload vulnerability in the upload plugin of Textpattern v4.8.8 and below allows attackers to execute arbitrary code by uploading a crafted PHP file.

Frequently asked questions

What is CVE-2023-26852?: An arbitrary file upload vulnerability in the upload plugin of Textpattern v4.8.8 and below allows attackers to execute arbitrary code by uploading a crafted PHP file.
How severe is CVE-2023-26852?: CVE-2023-26852 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-26852 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-2023-26852?: CVE-2023-26852 affects Textpattern. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-26852?: 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-2023-26852 published?: CVE-2023-26852 was published on 2023-04-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:textpattern:textpattern:*:*:*:*:*:*:*:*

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CVE-2020-19510 — Critical (CVSS 9.8): Textpattern 4.7.3 contains an aribtrary file load via the file_insert function in include/txp_file.php.
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