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PatchSiren cyber security CVE debrief

CVE-2024-39891 Twilio CVE debrief

CVE-2024-39891 is an information disclosure vulnerability affecting Twilio Authy and is listed by CISA as a Known Exploited Vulnerability. Based on the supplied corpus, defenders should treat it as urgent: follow vendor guidance, and if mitigations are not available, stop using the product.

Vendor
Twilio
Product
Authy
CVSS
MEDIUM 5.3
CISA KEV
Listed
Original CVE published
2024-07-23
Original CVE updated
2024-07-23
Advisory published
2024-07-23
Advisory updated
2024-07-23

Who should care

Security teams, IT administrators, and application owners using Twilio Authy should prioritize this CVE, especially because CISA has already listed it in KEV and set a remediation due date.

Technical summary

The supplied source corpus identifies CVE-2024-39891 as an information disclosure issue in Twilio Authy, but it does not provide affected versions, root cause details, or exploit mechanics. CISA’s KEV entry marks it as known exploited and instructs organizations to apply vendor mitigations or discontinue use of the product if mitigations are unavailable.

Defensive priority

High. CISA KEV listing indicates known exploitation and a time-bound remediation expectation, so this should be handled as an urgent defensive item.

Recommended defensive actions

  • Review Twilio’s security guidance referenced by CISA for Authy and apply any available mitigations.
  • If mitigations are unavailable or cannot be deployed quickly, discontinue use of Authy as CISA directs.
  • Inventory where Authy is in use so you can scope impact and prioritize remediation.
  • Validate status against the CISA KEV entry and the official NVD/CVE records for any updated guidance.
  • Track vendor updates after remediation to confirm whether additional actions are required.

Evidence notes

CISA’s KEV feed lists CVE-2024-39891 as "Twilio Authy Information Disclosure Vulnerability," with dateAdded 2024-07-23 and dueDate 2024-08-13. The KEV note states: "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable." The KEV metadata also cites Twilio’s security alert and the NVD record as supporting references.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-39891 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-39891

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

  • CVE-2024-39891 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-39891

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

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

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.