Medium severity · published Jun 9, 2026
CVE-2026-34033
Apache Answer: HTML Content Injection in Email
5.4
CVSS
0.3%
EPSS
No
On KEV
Description
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in Apache Answer.
This issue affects Apache Answer: through 2.0.0.
User-supplied content was included in notification emails without proper escaping, allowing authenticated users to inject arbitrary HTML into emails sent to other users.
Users are recommended to upgrade to version 2.0.1, which fixes the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Apache Answer · Apache Software Foundation
through 2.0.0 · source: vendor
AN
Answer · Apache
before 2.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34033
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34033
Mailing List
https://lists.apache.org/thread/wrfd9blbfotfg479jr8vlwfx6pwr9sgj
Mailing List
http://www.openwall.com/lists/oss-security/2026/06/09/3
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