Roundcube Webmail up to 1.6.17/1.7.2 Address Book cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.21

Summaryinfo

A vulnerability classified as problematic has been found in Roundcube Webmail up to 1.6.17/1.7.2. Affected by this issue is some unknown functionality of the component Address Book. The manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-74999. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Roundcube Webmail up to 1.6.17/1.7.2 and classified as problematic. This issue affects some unknown processing of the component Address Book. 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:

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS.

It is possible to read the advisory at roundcube.net. The identification of this vulnerability is CVE-2026-74999 since 08/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.6.18 or 1.7.3 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Webmail 1.6.18/1.7.3

Timelineinfo

08/17/2026 Advisory disclosed
08/17/2026 +0 days CVE reserved
08/17/2026 +0 days VulDB entry created
08/17/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: roundcube.net
Status: Confirmed

CVE: CVE-2026-74999 (🔒)
GCVE (CVE): GCVE-0-2026-74999
GCVE (VulDB): GCVE-100-391271

Entryinfo

Created: 08/17/2026 15:16
Changes: 08/17/2026 15:16 (64)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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