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Fencer Intel
no cvss —

CVE-2026-120212 json

Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output

published yesterday modified yesterday also EUVD-2026-121639

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output.

HTML::Tags and XML::Tags escape a plain string value by replacing only &, ", < and > with entities. A value interpolated into a single-quoted attribute, as in <a href='$value'>, can therefore close the attribute and add new ones, such as an event handler. Double-quoted attributes are not affected.

An attacker who controls a value that an application interpolates into a single-quoted attribute can inject script into the generated page.

Patch / fix

  • cpan Web-Simple 0.037

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Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-11).

Affected products

  • cpan Web-Simple

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.