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Fencer Intel
medium 5.3

CVE-2020-29041 json

A misconfiguration in Web-Sesame 2020.1.1.3375 allows an unauthenticated attacker to download the source code of the application, facilitat…

published 5y ago modified 4mo ago also EUVD-2020-21423

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

A misconfiguration in Web-Sesame 2020.1.1.3375 allows an unauthenticated attacker to download the source code of the application, facilitating its comprehension (code review). Specifically, JavaScript source maps were inadvertently included in the production Webpack configuration. These maps contain sources used to generate the bundle, configuration settings (e.g., API keys), and developers' comments.

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Exploit prediction

1.37% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • blog.bssi.fr https://blog.bssi.fr/source-code-vulnerability-disclosure-discovered-in-the-web-sesame-application-of-til-technologies/ referenced PoC, tagged "exploit" by a source, unverified
  • blog.bssi.fr https://blog.bssi.fr/vulnerabilite-de-divulgation-de-code-source-identifiee-au-sein-de-lapplication-web-sesame-de-til-technologies/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.