CVE-2026-10827 json
Spectra (Ultimate Addons for Gutenberg) < 2.20.0 - Contributor+ Stored CSS Injection via Block Attributes
published 2026-08-01 3 mo ago modified 2026-08-26 2 mo ago also EUVD-2026-51696
- cvss
- 3.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
The Spectra Legacy WordPress plugin before 2.20.0 does not validate or escape several block style attributes before using them to build the CSS it outputs on the front end, allowing users with the Contributor role and above to inject arbitrary CSS into the pages that render the affected block. The injected styles are served to anonymous visitors of those pages and can force external resource loads, deface/redress the page, or exfiltrate data via CSS attribute selectors. JavaScript execution is not possible at this role (the script-tag breakout is removed by KSES), so the impact is limited to CSS injection.
Patch / fix
- Unknown Spectra Legacy 2.20.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- wpscan.com https://wpscan.com/vulnerability/068ac525-423b-42f8-9ef4-f102f948dc78/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N |
Affected products
- Unknown Spectra Legacy
Classification
- Weakness
-
- CWE-345 Insufficient Verification of Data Authenticity
- Technology feeds
References
-
wpscan.com
/vulnerability/068ac525-423b-42f8-9ef4-f102f948dc78/
exploit, vdb-entry, technical-description
Sources
- CVE List CVE-2026-10827
- NVD CVE-2026-10827
Fencer Vulns 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.