CVE-2022-26874Public exploitNetwork attack vector

Account takeover via unsanitized OpenDocument preview

Published Mar 11, 2022 · Updated Oct 19, 2024

Stored XSS in Horde Mime_Viewer before 2.2.4 allows remote authenticated users to steal a victim's webmail session via a crafted document. Ooo.php returns XHTML produced by opendoc2xhtml.xsl without applying Horde's XSS filter, so attacker-controlled content.xml elements can become script tags. The victim must preview the attached OpenDocument; script execution in the victim's session permits mailbox access and account takeover.

CVSS severity5.4
Medium
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Horde Mime_Viewer before 2.2.4 allows remote authenticated users to steal a victim's webmail session via a crafted document. Ooo.php returns XHTML produced by opendoc2xhtml.xsl without applying Horde's XSS filter, so attacker-controlled content.xml elements can become script tags. The victim must preview the attached OpenDocument; script execution in the victim's session permits mailbox access and account takeover.

The record

CVE
CVE-2022-26874
Published
Mar 11, 2022
Updated
Oct 19, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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