Xapian Core up to 1.4.31/2.0.x termgenerator_internal.cc Xapian::MSet::snippet cross site scripting

Summaryinfo

A vulnerability has been found in Xapian Core up to 1.4.31/2.0.x and classified as problematic. Impacted is the function Xapian::MSet::snippet of the file queryparser/termgenerator_internal.cc. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2026-77643. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Xapian Core up to 1.4.31/2.0.x. It has been rated as problematic. This issue affects the function Xapian::MSet::snippet of the file queryparser/termgenerator_internal.cc. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

A cross-site scripting vulnerability in queryparser/termgenerator_internal.cc in Xapian xapian-core before 2.1.0 and before 1.4.32 exists due to incomplete HTML escaping by Xapian::MSet::snippet(). NOTE: this issue exists because of a missed corner case of CVE-2018-0499.

The advisory is shared at bugs.debian.org. The identification of this vulnerability is CVE-2026-77643 since 08/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 1.4.32 or 2.1.0 eliminates this vulnerability.

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Productinfo

Vendor

• Xapian

Name

• Core

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.8
• 1.4.9
• 1.4.10
• 1.4.11
• 1.4.12
• 1.4.13
• 1.4.14
• 1.4.15
• 1.4.16
• 1.4.17
• 1.4.18
• 1.4.19
• 1.4.20
• 1.4.21
• 1.4.22
• 1.4.23
• 1.4.24
• 1.4.25
• 1.4.26
• 1.4.27
• 1.4.28
• 1.4.29
• 1.4.30
• 1.4.31
• 2.0

CPE 2.3info

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CPE 2.2info

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