CVE-2026-9016 json
Debug Log Manager <= 2.5.0 - Unauthenticated Improper Output Neutralization for Logs via log_js_errors AJAX Action
published 5mo ago modified 3mo ago also EUVD-2026-34960
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
The Debug Log Manager – Conveniently Monitor and Inspect Errors plugin for WordPress is vulnerable to Improper Output Neutralization for Logs in all versions up to, and including, 2.5.0. This is due to the `log_js_errors()` AJAX handler being registered for unauthenticated users via `wp_ajax_nopriv_log_js_errors` and gated only by a nonce that is publicly disclosed in every front-end page's HTML through `wp_localize_script()` whenever JavaScript error logging is enabled, providing no real authorization barrier. This makes it possible for unauthenticated attackers to inject arbitrary forged entries into the site's WordPress debug log by supplying attacker-controlled values for the `message`, `script`, `lineNo`, `columnNo`, and `pageUrl` fields — enabling spoofing of error and incident records, obscuring malicious activity within fabricated log noise, and misleading administrators who rely on the log for triage. This vulnerability is only exploitable when the plugin's JavaScript error logging feature is enabled, as the requisite nonce is only published into the page HTML under that condition.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- qriouslad Debug Log Manager – Conveniently Monitor and Inspect Errors
Classification
- Weakness
-
- CWE-117 Improper Output Neutralization for Logs
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/25abca87-1be2-427e-ab01-377d52917052?source=cve
- plugins.trac.wordpress.org /browser/debug-log-manager/tags/2.4.3/classes/class-debug-log.php#L1961
- plugins.trac.wordpress.org /browser/debug-log-manager/tags/2.4.3/classes/class-debug-log.php#L1947
- plugins.trac.wordpress.org /browser/debug-log-manager/tags/2.4.3/bootstrap.php#L123
- plugins.trac.wordpress.org /browser/debug-log-manager/tags/2.4.3/bootstrap.php#L556
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3543321%40debug-log-manager&new=3543321%40debug-log-manager&sfp
Sources
- CVE List CVE-2026-9016
- NVD CVE-2026-9016
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.