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Fencer Intel
medium 5.4

CVE-2019-20204 json

The Postie plugin 1.9.40 for WordPress allows XSS, as demonstrated by a certain payload with jaVasCript:/* at the beginning and a crafted S…

published 6y ago modified 4mo ago also EUVD-2019-10758

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
1
Exploit-DB

Summary

The Postie plugin 1.9.40 for WordPress allows XSS, as demonstrated by a certain payload with jaVasCript:/* at the beginning and a crafted SVG element.

Is CVE-2019-20204 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. Published
  2. First public exploit (EDB-47925)

Exploit prediction

3.38% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-47925 WordPress Plugin Postie 1.9.40 - Persistent Cross-Site Scripting webapps, 2020-01-16
  • github.com https://github.com/V1n1v131r4/Exploiting-Postie-WordPress-Plugin-/blob/master/README.md referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/155973/WordPress-Postie-1.9.40-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

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.