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PatchSiren cyber security CVE debrief

CVE-2026-120190 mvdicarlo CVE debrief

A security flaw has been discovered in PostyBirb Plus up to 3.1.75, affecting an unknown functionality of the file ui/src/views/submissions/submission-forms/form-components/DescriptionInput.tsx of the component Submission Description Editor. The manipulation results in cross site scripting. The attack may be performed from remote. Upgrading to version 3.1.76 addresses this issue. This vulnerability has significant implications for defenders and administrators of PostyBirb Plus deployments, as it could potentially allow attackers to inject malicious scripts into the application, leading to unauthorized actions or data breaches. Therefore, it is crucial to assess exposure and upgrade

Vendor
mvdicarlo
Product
PostyBirb Plus
CVSS
LOW 2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-11-01
Original CVE updated
2026-11-01
Advisory published
2026-11-01
Advisory updated
2026-11-01

Who should care

Defenders and administrators of PostyBirb Plus deployments should assess exposure and prioritize upgrading to version 3.1.76. They should also verify if PostyBirb Plus is used in their environment and monitor for potential attacks. Additionally, they should review and update affected deployments to prevent potential data breaches.

Why it matters

CVE-2026-120190 is a cross-site scripting vulnerability in PostyBirb Plus up to version 3.1.75. Defenders should assess exposure, prioritize upgrading to version 3.1.76, and monitor for potential attacks.

  • Defenders should verify if PostyBirb Plus is used in their environment and assess exposure to cross-site scripting attacks.
  • Administrators should prioritize upgrading to version 3.1.76 to address the vulnerability.
  • Defenders should monitor for potential attacks exploiting this vulnerability.

Technical summary

The vulnerability affects the Submission Description Editor in PostyBirb Plus up to version 3.1.75, allowing for cross-site scripting attacks. The exploit has been released to the public and may be used for attacks. This vulnerability has significant implications for defenders and administrators of PostyBirb Plus deployments, as it could potentially allow attackers to inject malicious scripts into the application, leading to unauthorized actions or data breaches. Therefore, it is crucial to assess exposure and prioritize upgrading to version 3.1.76.

Defensive priority

Upgrade to version 3.1.76 to address the cross-site scripting vulnerability in PostyBirb Plus.

Recommended defensive actions

  • Upgrade PostyBirb Plus to version 3.1.76
  • Review and update affected deployments
  • Monitor for potential attacks
  • Verify if PostyBirb Plus is used in the environment
  • Assess exposure to cross-site scripting attacks
  • Prioritize upgrading to version 3.1.76
  • Track exceptions and retest remediated assets

Evidence notes

The CVE record and source metadata indicate a cross-site scripting vulnerability in PostyBirb Plus up to version 3.1.75. The exploit has been released to the public and may be used for attacks. Upgrading to version 3.1.76 addresses this issue. The vulnerability affects the Submission Description Editor in PostyBirb Plus, allowing for cross-site scripting attacks. Defenders should verify if PostyBirb Plus is used in their environment and assess exposure to cross-site scripting attacks. The source of this information is the CVE record,

Sources and references

Verified primary and authoritative sources

  • CVE-2026-120190 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-120190

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-120190 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-120190

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.