CVE-2023-26852

HIGHNVD 7.27.2—Elevated

7.2

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.

CVSS v3: 7.2
EG Score: 7.2(medium)
EPSS: 95.1%
KEV: Not listed

Published

April 12, 2023

Last Modified

February 10, 2025

References (6)

cve@mitrehttps://drive.google.com/drive/folders/1x55FGWZydBRxFyTVIAL1ynnk1X7gfIq9?usp=sharing
cve@mitrehttps://github.com/leekenghwa/CVE-2023-26852-Textpattern-v4.8.8-and-
cve@mitrehttps://github.com/textpattern/textpattern
af854a3a-2127-422b-91ae-364da2661108https://drive.google.com/drive/folders/1x55FGWZydBRxFyTVIAL1ynnk1X7gfIq9?usp=sharing
af854a3a-2127-422b-91ae-364da2661108https://github.com/leekenghwa/CVE-2023-26852-Textpattern-v4.8.8-and-
af854a3a-2127-422b-91ae-364da2661108https://github.com/textpattern/textpattern

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-434Unrestricted Upload of File with Dangerous Type

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-25 03:13 UTCEG score recompute
2026-05-25 03:13 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-26852?

CVE-2023-26852 is a high vulnerability published on April 12, 2023. 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.

When was CVE-2023-26852 disclosed?

CVE-2023-26852 was first published in the National Vulnerability Database on April 12, 2023, with the most recent update on February 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-26852 actively exploited?

CVE-2023-26852 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-26852?

CVE-2023-26852 has a CVSS v3 base score of 7.2 (NVD).

How do I remediate CVE-2023-26852?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-26852, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-26852

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-26852?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)