CVE-2022-31888Public exploitNetwork attack vector

Session hijacking via retained preauthentication cookie

Published Apr 5, 2023 · Updated Feb 13, 2025

Session fixation in osTicket 1.16.2 and earlier allows remote attackers to hijack agent or user sessions after victim login. The login methods in include/class.auth.php retain an attacker-chosen OSTSESSID cookie instead of invalidating it and issuing a new session identifier after authentication. An attacker must first set or learn the victim's preauthentication session value and then wait for the victim to authenticate through either login interface.

CVSS severity8.8
High
EPSS probability1.21%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in osTicket 1.16.2 and earlier allows remote attackers to hijack agent or user sessions after victim login. The login methods in include/class.auth.php retain an attacker-chosen OSTSESSID cookie instead of invalidating it and issuing a new session identifier after authentication. An attacker must first set or learn the victim's preauthentication session value and then wait for the victim to authenticate through either login interface.

The record

CVE
CVE-2022-31888
Published
Apr 5, 2023
Updated
Feb 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-384, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-384Session Fixation
T1550.004Web Session Cookie

Public exploit references

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Technologies

Your stack

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Your stack

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