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DB2 Recovery Expert EUVDEUVD-2025-211065

| CVE-2025-27895 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-10-12 ibm GHSA-4vq9-4vc4-5q8h
6.1
CVSS 3.1 · Vendor: ibm
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Craft malicious link with embedded JavaScript
  2. Delivery
    Deliver link to Web UI user
  3. Exploit
    Victim clicks and payload reflects
  4. Execution
    Script executes in trusted session
  5. Impact
    Exfiltrate session credentials

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation targets the product's Web UI, which must be reachable by the attacker's payload and rendered by a victim. The description specifies the attacker embeds arbitrary JavaScript that executes 'within a trusted session,' meaning a logged-in user (typically a DBA/administrator) must be induced to trigger the reflected script - the required user interaction (UI:R) is the primary limiting factor. While the attacker themselves need not authenticate (PR:N), meaningful impact (credential/session disclosure) depends on a victim with an active authenticated session interacting with the malicious content. Limited to IBM DB2 Recovery Expert for Linux, UNIX and Windows version 5.5 IF 2; no availability impact and only partial confidentiality/integrity impact apply.

Impact

This is a medium-severity reflected cross-site scripting flaw (CVSS 6.1, CWE-79) whose real-world priority is moderate-to-low. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N shows network reach and no authentication (PR:N), but exploitation is gated by required user interaction (UI:R) - a victim must click an attacker-crafted link or load attacker-influenced content, which is the single biggest limiting factor. No EPSS score, SSVC decision, KEV listing, or POC indicator was supplied in the input, so there is no signal of active or probable exploitation; per the input this is 'no public exploit identified at time of analysis.' The scope-change (S:C) and low confidentiality/integrity impacts reflect classic session/credential-theft potential within a trusted session rather than direct server compromise (A:N, no availability impact). Net: a vendor-patched XSS in a specialized database-recovery tool - worth remediating via the available IBM patch, but not an emergency given the absence of exploitation evidence and the user-interaction requirement. No CVSS-versus-description conflict exists: the description ('embed arbitrary JavaScript in the Web UI,' 'within a trusted session') is fully consistent with the AV:N/UI:R/S:C/C:L/I:L vector.

Exploit ScenarioDerived

An attacker crafts a URL or input containing malicious JavaScript that is reflected unmodified by the DB2 Recovery Expert Web UI, then lures an authenticated administrator into clicking it (satisfying the UI:R requirement). When the victim's browser renders the response, the script executes in their trusted session and can exfiltrate session tokens or credentials. No public exploit code was identified in the provided data.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 12, 2026

Reflected cross-site scripting in IBM DB2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2 lets an unauthenticated attacker inject arbitrary JavaScript into the product's Web UI, which then executes in the browser of a logged-in user within a trusted session and can lead to credential or session disclosure. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, score 6.1) shows the attacker does not need to authenticate, but a victim with an active session must be induced to trigger the reflected payload, making user interaction the primary limiting factor and the practical risk moderate-to-low. No public exploit code or confirmed active exploitation has been identified at time of analysis, and a vendor patch is available (CWE-79).

RemediationAI

Vendor-released patch: IBM publishes the fix and guidance for this issue at https://www.ibm.com/support/pages/node/7290893, tagged as a patch reference; because no exact patched interim-fix number is given in the available data, administrators should retrieve the recommended fix level for the 5.5 stream from that IBM Support page (or Fix Central) and apply it, using the advisory's fix-level table to confirm whether 5.5 IF 2 must be superseded by a later interim fix. Where patching must be scheduled, compensating controls for this reflected XSS are: restrict network access to the DB2 Recovery Expert Web UI to trusted administrative subnets or VPN only, since the tool is used by DBAs and has no need for broad exposure (trade-off: reduced remote/admin flexibility); ensure the application's session cookies are marked HttpOnly and Secure and keep session timeouts short so a successful script execution cannot trivially harvest long-lived credentials (trade-off: users re-authenticate more often); and instruct DBAs not to click unsolicited links into the recovery portal. A reverse proxy or WAF rule set enforcing output encoding and blocking script-bearing query parameters on the Web UI paths offers limited mitigation and can be bypassed, so it should be treated as a stopgap, not a fix. Verifying that no reflected input reaches the UI without HTML encoding after patching is the recommended validation step.

Affected VersionsENISA

DB2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2

Affects your stack

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Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This is a classic reflected cross-site scripting (XSS) issue (CWE-79) in the Web UI of IBM DB2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2, a database recovery and data-management tool typically operated by DBAs. The root cause is improper neutralization of user-supplied input that is echoed back into an HTML response without adequate output encoding, allowing script to be reflected into a victim's browser rather than stored. The CVSS vector is notable in two respects: PR:N confirms the attacker delivering the crafted request need not hold credentials on the target, while UI:R confirms exploitation depends on a logged-in victim following a malicious link or otherwise rendering the injected content; the scope change (S:C) reflects that the injected script executes in the security context of the victim's browser session, which can affect resources beyond the Web UI component itself. Per the CPE record cpe:2.3:a:ibm:db2_recovery_expert_for_linux,_unix_and_windows:*:*:*:*:*:*:*:* the affected product line is tracked with a wildcard version, while the vendor description scopes the known exposure to release 5.5 IF 2; confidentiality and integrity impacts are rated Low and there is no availability impact.

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Severity by source

Vendor (ibm) PRIMARY 6.1 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
vuln.today AI 6.1 MEDIUM

Reflected XSS reachable over network without attacker auth (PR:N) but requiring victim interaction (UI:R); script crosses into the user's trusted session (S:C) with limited C/I impact and no availability effect.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (ibm).

CVSS VectorVendor: ibm

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionCVE.org

IBM DB2 Recovery Expert for Linux, UNIX and Windows 5.5 IF 2 is vulnerable to cross-site scripting. This vulnerability allows an unauthenticated attacker to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Prevalence
Low
niche IBM database-recovery administration tool, specialized footprint
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

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