Affected versions: ≥ 3.0.0 and < 3.1.9
Full advisory: our disclosure post
CVE-2026-115452HighCVSS 7.5CVE published 5 November 2026Added to mySites.guru 5 November 2026
Tassos Advanced Custom Fields (plg_system_acf) below 3.1.9 and below 2.8.16 - CVE-2026-115452 Authenticated Stored XSS in Map Marker Labels
Advanced Custom Fields for Joomla by Tassos Marinos (Free and Pro) has two security flaws. CVE-2026-115452 (CVSS 4.0 7.5 High) is a stored cross-site scripting flaw in the Map field's marker labels (Free and Pro): a user who can edit a Map marker label, such as an article author, can add a script that runs for anyone who opens the marker. The CVE lists 3.0.0 to 3.1.8 and 2.8.2 to 2.8.15 as affected. The second flaw, in the Gallery field's image removal, is CVE-2026-115451 and has its own rule. The vendor fixed both in 3.1.9 for Joomla 4 and later (4 November 2026) and in 2.8.16 for Joomla 3 (5 November 2026). The fixes are in the bundled Tassos Framework: marker labels and addresses are now filtered for scripts and event handlers, and an image can only be removed from a gallery when the server issued a token for it. This is the Joomla extension from tassos.gr, NOT the WordPress plugin Advanced Custom Fields or its Advanced Custom Fields: Extended add-on. On Joomla 4, 5 or 6 update Advanced Custom Fields to 3.1.9 or later; on Joomla 3 update to 2.8.16.
Is my site affected?
CVE-2026-115452 is checked by 4 rules. Find the extension and release line your site runs:
| Extension | Affected versions | Fixed in | What to do |
|---|---|---|---|
| Tassos Advanced Custom Fields | from 3.0.0 up to but not including 3.1.9 | 3.1.9 | Update Tassos Advanced Custom Fields to 3.1.9 or later. |
| Tassos Advanced Custom Fields | before 2.8.16 | 2.8.16 | Update Tassos Advanced Custom Fields to 2.8.16 or later. |
| Tassos Smile Pack | from 2.0.0 up to but not including 2.1.7 | 2.1.7 | Update Tassos Smile Pack to 2.1.7 or later. |
| Tassos Smile Pack | from 1.1.2 up to but not including 1.2.10 | 1.2.10 | Update Tassos Smile Pack to 1.2.10 or later. |
How CVE-2026-115452 is scored
The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.
7.5 High
CVSS 4.0, scored by Joomla CNACVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:NHow it is reached
- AV:N Attack vector
- Network. Reachable across the internet
- AC:L Attack complexity
- Low. Nothing to work around, it just works
- AT:P Attack requirements
- Present. Needs a particular deployment or race to line up
- PR:H Privileges required
- High. Needs an account with elevated rights
- UI:N User interaction
- None. Nobody has to be tricked into anything
What it does to the site
- VC:H Confidentiality
- High. Everything the site holds can be read
- VI:H Integrity
- High. Data and files can be altered at will
- VA:L Availability
- Low. The site slows or stutters
What it does beyond the site
- SC:N Confidentiality
- None. Other systems keep their data
- SI:N Integrity
- None. Other systems keep their integrity
- SA:N Availability
- None. Other systems stay up
Timeline
- 4 November 2026We published: Tassos ACF and Smile Pack for Joomla Fix Two CVEs: a Map XSS and Gallery Image Deletion
- 5 November 2026CVE-2026-115452 record published by its CNA
- 5 November 2026mySites.guru check added for Tassos Advanced Custom Fields (from 3.0.0 up to but not including 3.1.9)
- 5 November 2026mySites.guru check added for Tassos Advanced Custom Fields (before 2.8.16)
- 5 November 2026mySites.guru check added for Tassos Smile Pack (from 2.0.0 up to but not including 2.1.7)
- 5 November 2026mySites.guru check added for Tassos Smile Pack (from 1.1.2 up to but not including 1.2.10)
Rule details
Tassos Advanced Custom Fields - Tassos Advanced Custom Fields (plg_system_acf) below 3.1.9 and below 2.8.16 - CVE-2026-115452 Authenticated Stored XSS in Map Marker Labels
Advanced Custom Fields for Joomla by Tassos Marinos (Free and Pro) has two security flaws. CVE-2026-115452 (CVSS 4.0 7.5 High) is a stored cross-site scripting flaw in the Map field's marker labels (Free and Pro): a user who can edit a Map marker label, such as an article author, can add a script that runs for anyone who opens the marker. The CVE lists 3.0.0 to 3.1.8 and 2.8.2 to 2.8.15 as affected. The second flaw, in the Gallery field's image removal, is CVE-2026-115451 and has its own rule. The vendor fixed both in 3.1.9 for Joomla 4 and later (4 November 2026) and in 2.8.16 for Joomla 3 (5 November 2026). The fixes are in the bundled Tassos Framework: marker labels and addresses are now filtered for scripts and event handlers, and an image can only be removed from a gallery when the server issued a token for it. This is the Joomla extension from tassos.gr, NOT the WordPress plugin Advanced Custom Fields or its Advanced Custom Fields: Extended add-on. On Joomla 4, 5 or 6 update Advanced Custom Fields to 3.1.9 or later; on Joomla 3 update to 2.8.16.
Affected versions: < 2.8.16
Full advisory: our disclosure post
Tassos Smile Pack - Tassos Smile Pack (com_smilepack) below 2.1.7 and below 1.2.10 - CVE-2026-115452 Authenticated Stored XSS in Map Marker Labels
Smile Pack for Joomla by Tassos Marinos has two security flaws, the same pair fixed in Tassos Advanced Custom Fields this week. CVE-2026-115452 (CVSS 4.0 7.5 High) is a stored cross-site scripting flaw in the Map module's marker labels: a user who can edit a Map marker label can add a script that runs for anyone who opens the marker. The CVE lists Smile Pack 2.0.0 to 2.1.6 and 1.1.2 to 1.2.9 as affected. The second flaw, in the Gallery image removal, is CVE-2026-115451 and has its own rule. The vendor fixed both in Smile Pack 2.1.7 for Joomla 4 and later (4 November 2026) and in 1.2.10 for Joomla 3 (5 November 2026). On Joomla 4, 5 or 6 update Smile Pack to 2.1.7 or later; on Joomla 3 update to 1.2.10.
Affected versions: ≥ 2.0.0 and < 2.1.7
Full advisory: our disclosure post
Tassos Smile Pack - Tassos Smile Pack (com_smilepack) below 2.1.7 and below 1.2.10 - CVE-2026-115452 Authenticated Stored XSS in Map Marker Labels
Smile Pack for Joomla by Tassos Marinos has two security flaws, the same pair fixed in Tassos Advanced Custom Fields this week. CVE-2026-115452 (CVSS 4.0 7.5 High) is a stored cross-site scripting flaw in the Map module's marker labels: a user who can edit a Map marker label can add a script that runs for anyone who opens the marker. The CVE lists Smile Pack 2.0.0 to 2.1.6 and 1.1.2 to 1.2.9 as affected. The second flaw, in the Gallery image removal, is CVE-2026-115451 and has its own rule. The vendor fixed both in Smile Pack 2.1.7 for Joomla 4 and later (4 November 2026) and in 1.2.10 for Joomla 3 (5 November 2026). On Joomla 4, 5 or 6 update Smile Pack to 2.1.7 or later; on Joomla 3 update to 1.2.10.
Affected versions: ≥ 1.1.2 and < 1.2.10
Full advisory: our disclosure post
Our disclosure post
Other vulnerabilities in Tassos Advanced Custom Fields and Tassos Smile Pack
Updating for CVE-2026-115452 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extensions.
Tassos Advanced Custom Fields
Latest safe version: 3.1.9
- CVE-2026-115451 Medium, from 3.1.4 up to but not including 3.1.9
Tassos Smile Pack
Latest safe version: 2.1.7
- CVE-2026-115451 Medium, from 2.1.2 up to but not including 2.1.7
References
- CVE-2026-115452 on cve.org (the official CVE record)
- CVE-2026-115452 in the NIST National Vulnerability Database
- Tassos ACF and Smile Pack for Joomla Fix Two CVEs: a Map XSS and Gallery Image Deletion
CVE-2026-115452 questions
Which versions are affected by CVE-2026-115452?
CVE-2026-115452 is covered by 4 rules: Tassos Advanced Custom Fields from 3.0.0 up to but not including 3.1.9; Tassos Advanced Custom Fields before 2.8.16; Tassos Smile Pack from 2.0.0 up to but not including 2.1.7; Tassos Smile Pack from 1.1.2 up to but not including 1.2.10.
How do I fix CVE-2026-115452?
It depends on the extension and release line your site runs. For Tassos Advanced Custom Fields from 3.0.0 up to but not including 3.1.9: update Tassos Advanced Custom Fields to 3.1.9 or later. For Tassos Advanced Custom Fields before 2.8.16: update Tassos Advanced Custom Fields to 2.8.16 or later. For Tassos Smile Pack from 2.0.0 up to but not including 2.1.7: update Tassos Smile Pack to 2.1.7 or later. For Tassos Smile Pack from 1.1.2 up to but not including 1.2.10: update Tassos Smile Pack to 1.2.10 or later.
How severe is CVE-2026-115452?
Joomla CNA scores it 7.5 (High) under CVSS 4.0. In plain terms: reachable across the internet, needs an account with elevated rights and nobody has to be tricked into anything.
Running an affected version on a site you manage?
A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, fix.mysites.guru is a single fixed fee per incident, usually resolved the same day.
This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.
Rules current as of 15 November 2026.