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Fencer Intel
medium 6.1

CVE-2021-42639 json

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are vulnerable to multiple reflected cross site scripting vulnerabilities.

published 4y ago modified 4mo ago also EUVD-2021-29603

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

PrinterLogic Web Stack versions 19.1.1.13 SP9 and below are vulnerable to multiple reflected cross site scripting vulnerabilities. Attacker controlled input is reflected back in the page without sanitization.

Patch / fix

  • printerlogic web_stack 19.1.1.13

Is CVE-2021-42639 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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Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • yahooinc.com https://www.yahooinc.com/paranoids/paranoids-vulnerability-research-printerlogic-issues-security-alert/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

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

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.