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CVE-2021-41467

Status: ModifiedMedium (6.1)—Exploit
Severity6.1Medium · CVSS 3.1
Exploitation probability3.60 %higher than 89% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableNuclei template (automated mass detection)

Cross-site scripting (XSS) vulnerability in application/controllers/dropbox.php in JustWriting 1.0.0 and below allow remote attackers to inject arbitrary web script or HTML via the challenge parameter.

CVSS

Base score
6.1
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
3.60 %
Percentile among all scored CVEs
89
Score date
10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (1)

Justwriting Project — Justwriting

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2021-41467",
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
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      "value": "Cross-site scripting (XSS) vulnerability in application/controllers/dropbox.php in JustWriting 1.0.0 and below allow remote attackers to inject arbitrary web script or HTML via the challenge parameter."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de tipo cross-site scripting (XSS) en el archivo application/controllers/dropbox.php en JustWriting versiones 1.0.0 y por debajo, permiten a atacantes remotos inyectar scripts web o HTML arbitrarias por medio del parámetro challenge"
    }
  ],
  "lastModified": "2026-06-17T04:08:33.190",
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