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Vulnerability · Published Feb 14, 2021 · Assigned by mitre

CVE-2021-26929

Medium 6.1

In plain English

A medium-severity security flaw in the php-horde-text-filter package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.9% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)4.9%top 7.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An XSS issue was discovered in Horde Groupware Webmail Edition through 5.2.22 (where the Horde_Text_Filter library before 2.3.7 is used). The attacker can send a plain text e-mail message, with JavaScript encoded as a link or email that is mishandled by preProcess in Text2html.php, because bespoke use of \x00\x00\x00 and \x01\x01\x01 interferes with XSS defenses.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12php-horde-text-filter2.3.7-1DEBIAN-CVE-2021-26929

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References