CVE-2021-47976 (GCVE-0-2021-47976)
Vulnerability from cvelistv5 – Published: 2026-05-16 15:26 – Updated: 2026-05-18 16:50
VLAI
EPSS
VEX
Title
TextPattern CMS 4.9.0-dev Authenticated Remote Code Execution via Plugin Upload
Summary
TextPattern CMS 4.9.0-dev contains a remote code execution vulnerability that allows authenticated attackers to upload arbitrary PHP files by exploiting the plugin upload functionality. Attackers can authenticate, retrieve a CSRF token from the plugin event page, and upload malicious PHP files to the textpattern/tmp/ directory for code execution.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-18 16:49 UTC
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/50095 | exploit |
| https://textpattern.com/ | product |
| https://github.com/textpattern/textpattern | product |
| https://www.vulncheck.com/advisories/textpattern-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Textpattern | TextPattern CMS |
Affected:
4.9.0-dev
cpe:2.3:a:textpattern:textpattern:4.9.0-dev:*:*:*:*:*:*:* cpe:2.3:a:textpattern:textpattern:4.9.0:-:*:*:*:*:*:* cpe:2.3:a:textpattern:textpattern:4.9.0:beta:*:*:*:*:*:* cpe:2.3:a:textpattern:textpattern:4.9.0:beta1:*:*:*:*:*:* cpe:2.3:a:textpattern:textpattern:4.9.0:beta1a:*:*:*:*:*:* cpe:2.3:a:textpattern:textpattern:4.9.0:beta2:*:*:*:*:*:* |
Date Public
2021-07-04 00:00
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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