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='$value'>, can therefore close the attribute and add new ones, such as an event handler. Double-quoted attributes are not affected.
An attacker who controls a value that an application interpolates into a single-quoted attribute can inject script into the generated page.
HTML::Tags and XML::Tags escape a plain string value by replacing only &, ", < and > with entities. A value interpolated into a single-quoted attribute, as in <a href='$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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
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Advisories
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Fixes
Solution
Upgrade to Web-Simple 0.037 or later.
Workaround
Use double-quoted attributes for values that may contain untrusted data.
References
History
Tue, 10 Nov 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output | |
| Weaknesses | CWE-79 | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-11-10T17:42:05.207Z
Reserved: 2026-10-31T13:26:38.835Z
Link: CVE-2026-120212
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses