CVE-2026-57957 (GCVE-0-2026-57957)

Vulnerability from cvelistv5 – Published: 2026-06-29 17:23 – Updated: 2026-06-30 11:15 X_Open Source
VLAI
Title
Papermark 0.22.0 - CORS Misconfiguration in Viewer Upload Endpoint
Summary
Papermark through 0.22.0 contains a cross-origin resource sharing (CORS) misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with Access-Control-Allow-Credentials set to true. Attackers can lure authenticated victims to malicious pages that silently issue credentialed cross-origin requests to upload arbitrary files into victim datarooms and read credentialed responses.
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
4.7 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
CWE
  • CWE-942 - Permissive Cross-domain Security Policy with Untrusted Domains
Assigner
References
Impacted products
Vendor Product Version
papermark papermark Affected: 0 , ≤ 0.22.0 (semver)
Create a notification for this product.
Date Public
2026-06-17 00:00
Credits
George Chen
Show details on NVD website
To clipboard 

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    "dateReserved": "2026-06-26T13:59:33.048Z",
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    "state": "PUBLISHED"
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  }
}


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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.


Detection rules are retrieved from Rulezet.